Hi
I will go straight with answering your question, and I must apologize to others who posted before me here because I really don't have time to read all the post.
First I want to tell you about your concern about Neptune being in your 7th.
The effects of planets entering new house by transit are most effective in the beginning, in the first degrees of the house, which does not mean that they loose the effect later, but you are experiencing those energies the most in the first degrees of the house cusp.
Neptune is natally in your 5th so Neptune transiting your 7th house is also affecting your 5th house.
Sagittarius is on the cusp of your 5th house and its ruler Jupiter is in the 6th. This shows that in relation to romances you want to find someone with whom you can talk, with whom you can share your life philosophies and maybe someone who is in your work environment?! But Sagittarius has another vice in it, and that is not being able to make a commitment because of his desire for adventures life, to be free in the horizon looking at the endless sky. And all this is in relation to the romances and how you enjoy the joy of life, because the 5th house is the house of Joy - how we enjoy the life.
So maybe you should ponder deeply into these questions, meditate upon them. Do not search the answer always from outside, it is within!
About the issues with your father and childhood. Your 4th house cusp is in Scorpio and your South node is there. There are Deep Emotions in it.
Pluto is on your IC. This is very, very Important! The angles are full with Power. Can you imagine, the planet of Power in the angle full of Power. There is deep instinctive memory in this Pluto! Much in your life would depend on how well you'll handle this Pluto, or to say it better, how much will you allow/surrender Pluto to handle you.
You can't fight with this Pluto, you can only surrender to it.
There are a lot of possibilities with this Pluto: violent childhood, violent past life or maybe just an unhappy memories from the past.
Remember that the 4th house is the House of Memory. Much of what is happening here is very Instinctive and in most of the cases what we can do best is to Observe, not to fight against.
This Pluto can bring enormous transformation, and probably will eventually.
It brings important evolutionary lesson in this phase of your growth.
You have enormous gift of looking into your own and the psyche of the people around you.
About your romantic life, it is closely related with your sense of emotional security and well being. The 5th house is naturally following the 4th and in 4th you have much happening and lessons that you need to resolve.
The emotional intensity and the Intense Strong Feelings that you have are felt like 'threatening' by your potential partners, not so many people have strong feelings, especially not in the start of the relationship. With Pluto on IC these inner volcano of powerful feelings can be immediately felt by the sensitive souls.
You need to work on this, to embrace everything which emerge from the past in your psyche. To resolve the conflicts of the memories that you're holding.
Another point is Saturn in Scorpio. Saturn in Scorpio can be manifested as repression of the sexuality and sexual desires. You're maybe feared that you can be seen less in the man's eyes if you give your self to him. But this will not be true if you find the real one, and the opinion of the bad personalities is not worth bothering at all.
I also have Pluto and Saturn in Scorpio and I know from experience how Rigid they 2 can be. You need to learn to make your will stronger by making it not Rigid, but more Flexible. You need to learn detachment and let go in certain areas in your life and this will result in bettering of your love life also.
What happened to you last year when Pluto Transit sextile your natal Pluto?
Pluto by transit is now at your 5th house and this is very important. It is not a matter of coincidence that you are starting to think about your love life in this period. Pluto is opening something to you, so open your self, be prepared.
Remember to follow the Pluto because it is holding one of the biggest potentials and lessons in your chart.