What's wrong with me?

We are rather similar. I'm 17, and I can't trust people either. That is probably your basic problem. It makes no sense to put your trust in people, because you know they will always fail you. And I understand why you don't want to be friends with other teenagers, although I feel like most adults act just like teenagers. My advice is to just try to be as open as you can to new experiences. Eventually you will find a good friend who you will want to trust. But you will probably be hurt a lot by people before then. And I wouldn't say there is anything wrong with you; you seem to understand yourself more than many other teenagers. Just don't define yourself by the others around you. There isn't something wrong with you just because you don't quite fit in to the status quo.