My girlfriend broke up with me because i'm apparently gay (am i really gay)?

You don't seem gay to me. You've said about a million times over that you don't like guys. That means you aren't gay. As for the way you dress and do your hair? I'd say you might be metrosexual, but there is nothing wrong with a guy caring about how he looks. The music you like shouldn't make a difference. I'm sorry people are calling you gay. I can't give any advice on that. Stop worrying about being gay!