Do I have a bit of Paranoia?

I think I might have Paranoia, I can't tell. When I don't get invited to a sleepover or something (I'm 13), I always think "Why didn't he invite me" "Doesn't he like me" I get all these negative thoughts. When I'm in public, I always think I'm different, when I'm not. I feel people are just staring at me. Does this mean I have a little bit of Paranoia?