I feel like an alien.

I honestly feel like an alien around my boyfriend’s friends. I used to be friends with one of them but now I think she doesn’t like me because something happened. I don’t know. And all of his girl friends are so pretty it makes me so sick. I feel like I’m not good enough. I deadass feel so awkward around them, like what did you even talk abt w ur bf’s friends….? I need some advice please .:/