Although I have not been officially diagnosed by a doctor or anything, I believe that I may have this Avoidant Personality Disorder. I have a tendency to avoid pretty much everyone, even my own family members. It's not that I don't like them, it's just that sometimes I start feeling like I don't want to be around them or for some reason I'm simply annoyed by their presence. I especially don't like being around people that I don't know, or don't know me. A big reason for this is that I'm so different from normal people and I can't seem to relate to anyone. If I'm with a group of people that are talking about sports, I won't say anything because I don't watch sports. If I'm with a group of people who are talking about Harry Potter (a book series which I am a bit obsessed with) I might say something, but only if someone directly asks me for my opinion. I'm afraid to speak my mind without being prompted, if I do I'll feel embarrassed and anxious or feel like I'm being rude, and I'm worried that no one will respond or that no one will care in which case I get even more anxious.

Anyone have any advice?
Is it possible for me to be medicated for this?