Howdy Anjelik,
Just here to give 2 cents. You had asked in your message why you two seem drawn to each other. Granted, these charts aren't the easiest to look at because they lack numbers. In essence, I'm forced to "eyeball" estimate if there exist synastric aspects or not.
The answer to attraction is usually very simple. Attraction means there are energy compatibilities. Let's strip the synastry down to basics and see what we find.
YOU
SUN/MOON Pisces/Water Gemini/Air
VENUS/MARS Capricorn/Earth Libra/Air
HIM
SUN/MOON Leo/Fire Taurus/Earth
VENUS/MARS Cancer/Water Leo/Fire
To be honest, I just don't see much compulsion in the attraction between these two charts. Hence the relationship was relatively short, I guess.
There's some general compatibilities between Suns and Moons, but they're not very tight. Some sexual chemistry can be seen in the compatibility of both your Mars positions. Yes, the Composite chart shows a Sun/Moon Conjunction, signaling a union of Male/Female psyches, and it did happen...but honestly Composite charts will never override basic planetary aspects, not when you're looking at long-term comparisons.
As you may have read elsewhere, Suns and Moons indicate persona. I tend to believe Suns are your public personality and Moons indicate your domestic mental posture. And you swim back and forth between them regardless of where you are.
There is general cross-compatibility between you two. No surprise here, there'd have to be at least some for you to hook up with him in the first place. Your Sun to his Moon (Water to Earth), and his Sun to your Moon (Fire to Air). This used to be a solid indication of compatibility in old times when women were submissive to men.
Nowadays, the way this "double cross-compatibility" works is that one person or the other is always making an effort to get along, while the other one psychically rests. And to be honest, it can be tiring for the person forced to be in the Sun persona too long or too often. The strongest aspect between your Lights is your Sun Sextile to his Moon, which means you're mostly the Sun person and he lets you be "responsible" for the relationship.
In your ambient presence, he tends to lose some of his Leo-ness and he goes to his Taurus Moon. But, he can't stay in his Moon forever either. When he tries to assert himself (Sun) and take ownership of you (Leo in love) to be "his" girlfriend, you don't necessarily feel like going to your Gemini Moon.
Instead, you probably tend to stay in Pisces where you two then undergo the elemental conflict (your Water vs. his Fire)
Complicating things a bit more is that both of you have wide Sun/Moon Squares in the natal charts. This means that shifts in personality are a bit extreme on both sides of the relationship. You're both moody, you being quicker, and him being heavier. Both of you can be one type of person in one circumstance, and then a completely different personality applying a different set of values in another.
So even though you both have elemental cross-capability, the shifts in personality are so extreme that he's either what you want in one moment...and then suddenly not what you want in the next moment...either because he shifted gears or you did in any given moment.
Think of it like this...when he's in a compatible personality, it's like being shined upon by a nice warm spotlight. You get used to it, because the warmth is more stable in the beginning of the relationship. Suddenly, he shuts it off and you're in the cold. Just like being thrown out in the snow, you can't acclimate to the cold immediately...you still crave the warmth. And just before you detach yourself emotionally, he turns it on again, and you find relief in the warmth. But, just before you can settle in, he turns it off again. Then, on again...then off again.
Believe it or not, the "Fixed" Signs (Taurus, Leo, Scorpio, Aquarius) do this IMHO quite deliberately, particularly Scorpio...but usually only when they're feeling fundamentally insecure about something. Their desire for control manifests itself negatively in a fear of abandonment...so they turn their affections repeatedly on and off, and then on and off again, over and over, in order to "jerk" their partners into some kind of submission or dependency within their various elements.
For Taurus/Earth it could be over money, status or physical stability and making signs of commitment. For Leo/Fire, it could be a submission in terms of identity, morality, values or ideology. For Scorpio/Water, issues usually revolve around basic emotional submission and sole dependency. For Aquarius, the submission is in terms of proper ways of thinking, thought and specific words of expression, philosophies or "outlooks" by which to guide life.
If a partner refuses or resists alignment with these insecurities, the Fixed Sign person in question tends to go immediately into fearing the other person will leave the relationship.
The reason why I'm going on this long shpiel about the Fixed Signs is that your man is Sun Leo Square to his Taurus Moon. Not only is he a double Fixed Sign in terms of Sun/Moon but they're in Square. Squares are aspects of On/Off...when one planet in the Square is expressing, it forcefully shuts off expression of the other planet, eventually causing suppression issues unless the person in question is quite self-aware and evolved.
So not only do you heighten his insecurities by being so elusive (double Mutable Signs), your own Sun/Moon are in Square aspect. This makes you a hard partner to please energy-wise, depending on which personality you decide to express. And on top of this, his insecurities shift so extremely, you don't even know what his issue will be from day to day. One day, he wants some kind of physical commitment from you (Taurus/Earth), the next he's maybe afraid you don't really view him as a competent man (Leo/Fire). Note, these insecurities have nothing to do with you. They are HIS internal issues which are either strengthened or ameliorated by his choice of partner. To be honest, his best partner is probably a double Water or Water/Earth woman, preferably with the Moon in a Fixed Sign, and Mars/Venus or Jupiter in the Fire/Air Signs. Such a woman would have a calmative effect on him. It would stabilize his Moon, but suppress his Sun, which he could then deal with over the long term using the stable platform of the relationship as a springboard.
Now the final question to explore would be why were you drawn into this relationship in the first place? The primary aspects of sudden giving-in to seduction usually involve synastric Oppositions, helped by a few synastric Trines/Sextiles. Oppositions ratchet up the tension between two people, while the Trines/Sextiles enable eventual release (Sex) of that tension.
Oppositions are aspects of unconsciousness. When we're in the presence of someone with key Oppositions to our natal planets, they can draw us out of ourselves. They put us to sleep in a way. Then, before we know it, we find ourselves involved in something, usually conflict to be honest.
I'm going to venture out and say its the fault of your Jupiter Opposition to his Moon. It's the tightest aspect in terms of degree. So, I'm guessing the first night together played out something like this. He was in an intimate setting, placing him in his Moon personality. You guys had fun, lots of laughs (your Jupiter). Moons are somewhat passive/aggressive...so he then said something or indicated that he was sexually available. And since you're the Sun, you made the pivotal decision, not him, to consummate the relationship. There *seems* to be a wide Mars Opposition to your Venus which might have made him more aggressive, but its kind of a coin toss for me to say so or not. His Jupiter Opposite his own Sun/Mars might also have been strong enough to shunt you to your Moon instead, making him a dynamic aggressor, but I don't think it likely. I think you've been in control of the relationship the entire time (your Sun in tight Sextile to his Moon).
There's also your Mercury Opposing his Sun/Mars Conjunction. Your general ideas about life might have captivated him at first, but Oppositions do not indicate acceptance. He found your mental quirkiness drawing him in, but became frustrated when he couldn't change you or unify it with himself (Mercury Opposition Sun).
Your Saturn Sextiled to his Sun indicates that you inspired some kind of commitment in him on a very basic level, but lack of any such aspects between his Saturn and your planets, indicates this was a one-sided view.
There's also one final element of seduction that doesn't really have anything to do with him. You're a Pisces, a Water sign. Pisces are psychic mirrors to some degree. Sometimes the challenge is to distinguish what thoughts and feelings are truly yours.
I remember doing the chart of a Pisces woman (several in fact), and all said to me the same thing (paraphrasing), "I just don't understand myself. Whenever I'm in front of my boyfriend/fiance/husband, I'm absolutely crazy about him...but when he leaves the room, I could care less about him."
There's nothing wrong happening, it's just that those with a strong Piscean influence have a tendency to reflect back what someone else is feeling. I've noticed Water Signs in general are prone to this vulnerability...Pisces being Exhibit A for psychic reflection, with Cancer and Scorpio still displaying emotional reflection tendencies, but less so.
So, there you go. And despite this looong passage of words, I probably haven't told you anything you didn't already know on some level.
And that's Astrology.
As always, none of what I've said is to be taken seriously or a guide to your life, nor do I claim that I'm never wrong. I'm simply interpreting your chart based on things I've seen in the past. I hope you've found this helpful. Merry Christmas and Happy New Year 2011.