I can relate to you on quite a few levels.. I also did not get a whole lot out of Humans in general.. I still struggle with it sometimes.. I use to not care very much about anyone.. and any feelings I did seem to show out to people seemed to be quite fake or that I was over exaggerating my feelings..

I also have quite a bit of a fantasy world so to speak.. I tend to often play scenarios in my mind with characters and everything..

I have only ever had a couple of friends at any one time after I left elementary school. Even tho I did not feel much for my friends (though I thought) I enjoyed their company strangely enough..

I know a bit of what you feel.. and I had felt these ways lots of the times until I had been reciveing treatment for depression for quite a few years.. I been on medications since I was 22 and it wasn't till then when I started feeling stuff more.. I actually became emotional attached to one of my currently good friends.. very strange for me..

So my suggestion to you is.. if you are not already doing so speak to a psych doc and talk them about what you are experiencing.. it could be some of your problems is with depression..

As for your problems with being around people.. I also have had this problem.. not quite as harsh as yours but similar.. I still tend to avoid comfronting people when there are more than a couple people in the house where I live.. like lastnight my bro had a couple friends over in the living room.. I stayed down in my room almost the entire time.. until my hunger drove me insane.. even then I quickly cooked something fast and took the food with me back to my room.. This is a form of anxiety.. and you can get treatment for it.. but sometimes you just have to try and deal with what you feel and fight it because it doesn't always work all the way. Also you might just be a loner type of person..

I also found that chatting with people online and eventually voice chatting with people has helped me with my anxiety and my extreme shyness. It still takes a bit for me to voice chat with ppl but I been getting better about it.