The kids in my school think I'm a devil worshiper?

It is perfectly ok for you to like whatever music you want to. = ) Don't worry so much what people say to, and just tell your friend that you don't care if people accept you and you like that kind of music. Tell that friend to try listening to it too and then you guys can talk about what makes you both like the music that you like. I personally don't like rap. But I like country, which a lot of people tell me I shouldn't like because it is stupid or written bad or hillbilly lyrics, but I like it so I listen to it anyway. Just be yourself and don't worry about others. You will be out of school in a few short years and you won't have to bother yourself with these people any more.