I was like that in high school too. I still have trouble making friends. I still get lonely sometimes, but mostly, I find that people disappoint me so I avoid them.

I agree with turquoisesea - are you in therapy? Although it doesn't always seem true, therapy does help. I was better in therapy because my therapist helped me distinguish between reality and my illusion or delusions. I've slipped since I stopped therapy and that's probably why I have no friends - again.

Also, the friends...if you don't go anywhere then it's really hard to meet people. I know that it can be very intimidating and scary to be around people that you don't know, but it can also be a lot of fun if you can stop yourself from worrying about what others are thinking (at least for me). Go places that you would enjoy anyway (for me - it's a bookstore) and bravely strike up a conversation with someone who looks interesting. You might be surprised. (of course, the mommy in me also would like to caution you to be careful with strangers...don't go anywhere with them until you get to know them better, etc. but that doesn't mean you can't meet them in public places with good lighting...lol)