I have the same feeling intially. I try to fight those feelings. Just because someone doesn't like me, doesn't mean that I am any lesser of a person, it just means our desires are different. I have to tell myself that a lot and fight the inner critic that torments me. I have to challange those feelings. It is very hard to do for me, but I can sometimes.

I think a lot of people have a real good sense of who they are and feel good about themselves. I never really had that. I try to use logic and reason as much as possible. When I fall short of that I jump to the polar opposite and hate the person. That sucks, but I feel better about being rejected that way. If I don't care about them, then I am not missing anything from thier rejection. That is probable a very unhealthy approach but it is how I work.