I feel so alone in a planet full of normal people?

You're 21 now. No one can force you to like anything. I'm 23 and love Bob Seger and Phil Collins. My friends think that's funny. So what? At this point in your life, you should be beyond caring about what other people think of you. Just like what you want and if anyone seriously has a problem with it, then they are immature and you shouldn't hang out with them anyway.