I don't see anything that prevents you from being in a relationship. Your chart has a lot of positive aspects and your 5th and 7th are not afflicted by malefics.
But I do see a few possible issues that need to be worked through perhaps.
You are a Cancer 12th house Sun, with Moon in Gemini and Leo rising. So it may be difficult for people to understand who you are, at first meeting.
You may come off in a Leonian manner, when actually you are less self confident than you first appear to be. Leo rising sometimes puts people off, but only as a self protection device, which Cancer Sun in the 12th may desire.
Having both Sun and Mars in the 12th may give you the urge to be alone and isolated because you are comfortable that way. Being at home, doing your own thing, seems just fine to you, and you like your creature comforts.
The Moon in Gemini has the desire for social activity, but that can be based upon friendship.
Do most of your potential relationships go into the 'Friend Zone' quickly and you cannot get them on the romantic track?
The ruler of your 7th Aquarius cusp is Saturn, which is I'm the 4th in Saggitarius.
It is a nice sign for Saturn, as it is lighthearted and optimistic, as far as Saturn goes. But it is in the 4th, which is a rough placement for Saturn, which belongs in the 10th or 11th.
Saturen in the 4th tends to block emotional intimacy. And your Saturn has an applying opposition from the Gemini Moon. So closeness and emotional intimacy may feel awkward and uncomfortable for you and for others who may try to get there with you.
Moon/Saturn oppositions tend to PUSH OTHERS AWAY---even if you don't want to. Its is like a knee jerk reaction of that opposition. Self preservation by sacrificing emotionally before you get hurt ?
There is a nice release point for that Moon/Saturn opposition. Your Mars makes a nice sextile and Trine to the 12th.
So your Mars in Leo in the 12th is the KEY to your breakthrough. You can form deep emotional connections if you DESIRE to do so.
IS IT SOMETHING YOU REALLY WANT?
Your Mars in the 12th is where your deepest intimate energy may bubble up. It is the way to short circuit that Moon/Saturn opposition. If you dont want to get friend zoned, you can pull you and your partner into that 12th house bubble, by being more vulnerable, more open and giving.