Does he like me back?

OK, so there's this guy I REALLY like. We've known each other for a year and we're pretty good friends. I've asked him to the dance countless of times, but he always says only if a Guns and Roses song comes up. Whenever we're in class, we always cast each other quick glances and his friends all say that he always asks about me and blushes at my name. Recently I confessed to the guy, and all he said was "I appreciate that" and walks away. He didn't say anything else and just left. After that, we're still friends and all, but I'm not sure if he ever will actually likes me back. Should I confess again or what?