Troubles in the island of loneliness

First of all, let me apologize for repeating the same old 'oh i'm alone, what could be wrong?' question once more. I assure you, I'll try to keep it as concise as possible. I am a soon 24 years old girl from Hungary. I've never had friends and now I believe I cannot take another step further with people. It's the darkest pit I've ever fell into.
In secondary school there were some classmates, who eventually used me and my naivety, a couple of extra pounds. I've always wanted to have a 'circle', so I tried to impress them but every action I took led to mockery and cruel games. So I went home and tried to find comfort with my parents. After some years went by, some of these merciless girls showed up at the my high school. Anyhow, I've still put effort just to fit in but as you could imagine, I failed. After stupid, untrue rumors spreading around the kids, the teachers as well, after getting left behind from every get-together, I stayed at home. Studying, surfing the net and letting my creative side take over could've mean one thing. Then about 10 years ago I've met a girl online, just like me. What was completely amazing? We could finish each other sentences, we eventually found that our hidden, artistic talent could be writing novels, experimenting with stories. So we started, and every week offered much more with her, in that safe cyberspace then out there in school. Or... at home. My great-grandma suffered two strokes somewhat later, so all the members of our family had to decide. They chose to take care of her at home. So finally, in school I had to deal with absolute loneliness, too. Watching someone suffer and slipping away from reality and life itself as well. Perhaps that girl and my creative intentions were the only things I could hold on to. I have to note here that she was as lonely as I was back then. After 3-4 years, we created amazing worlds but out there I somehow gave up understanding social codes, how to get closer to a boy. There wasn't anyone who I could actually like. I didn't go out, I couldn't lose weight. Eventually I thought, this really IS normal, after all my mom always wanted to comfort me with her -- now I know -- fictional lonely teenager years. I believed her back then. Gotta admit, I've always been very sickly. I missed out entire months, I got paralyzed at 14 for two weeks. My great-grandma died, so I wanted to change my life. First of all, the girl who I felt so close went to college one year before me and... pretty much made a tons of new friends. Got her first kiss and a camp-party, left me many times behind and stated 'I need others too'. That was the first time when I felt jealousy and guilt and that I might be a freak... Cause I needed that intimacy, that creativity and wanted to be her No1 friend all times. Another years later In short, I'm now a law student with no particular interest of the 'young adult night life'. I broke up with that 'bff' this year several times and... I just started wandering... What did I just screw up? I have colleagues, class mates but no mutual, 'fun' experiences to share. No one finds me entertaining enough to invite over. Going out or at least talking someone outside the 'official subjects' is too far away. At term-times I live alone at my apartment, in the summer at home. I prefer being alone most of the times, this helped me staying at the top of my class all the way. But... any other time... I don't feel anything else then being incapable, helpless, being a loner. Now my bff confronted me with a serious though: I'm needy, I'm possessive, so she's afraid to talk to me aside of our hobby. No one sees any normality here. My parents are always implying to 'a non-existent boyfriend, lack of it'.
Is there all there is? There's no joy, no real fun now. Only the law related dry subject, books, gray weekdays and - I'd never though I could say or write this but - lifeless, meaningless being... Why this suffering?
PS: Sorry for my possible bad grammar.