Hi there,
Sorry to hear that there's so many things effecting you, and particularly aspects about yourself that you feel so negatively about.
A lot of what you said conveys self - worthlessness, and a real sense that you have no control over either your feelings, or yourself as a person more generally as well.
You mention a few things that will be relate-able to a lot of people. Anxst around self - image and having a romantic partner to name just two. Anyone who has 'survived' their twenties will have some thoughts about this, some stories of their own. One thing will be more important than the other from each person to the next.
However some people feel a lot worse about life in a way that is not so common, and it can cause a lot of hurt early in life that will go on to effect their future. I'm not going to pretend I know how it is for you, what you should do ect because that would be foolish and wrong. However if your a doctor or health care professional has suggested BPS then this does help put a lot of what you mention into context (i.e. your unstable self image and your sense that people do not like you).
I reread your post and cannot help but notice how certain you sometimes are about what others think / feel about you. When you say 'girls aren't interested in me....?' What things do you see girls do that make you feel this way?
Got to say though, personally I feel very certain that you're doing one of the most vital things, which is getting professional help. 16 - 24 is a long time though and I literally have no idea what that has entailed for you, what that been like. - What help do you get these days aside from the medication?
Nearly the first thing you said was that you 'are the son of two idiots?' Do you still live with these people / are you close to them? I wonder what you think about this and whether it's important to you.
Anyway perhaps you already feel better after posting, and that would be good
All the best.