Whoah, dizzle. You need to chizzle. Magic isn't a competizzle. Just keep it rizzle. Don't be hatin'. Peace.
Seriously, though, everyone knows that when you have a problem with someone at school, the best way to deal with it is to challenge him to a big fight after school, and make sure you bring all your friends to keep him from bringing all his friends just to gang up and destroy you. After that, you spread the word around hoping that people will watch, and so that someone can leak it to the principle. Then you both get arrested, which solves everything.
Okay, SERIOUSLY, stupid joking aside... not trying to make you cry or anything, but I'd just try to chill with the guy and see if you can maybe share your art, exchange tips and stories, etc. If he's pissed and unreceptive, then just don't talk to him again, and the problem should go away. Teenagers have short attention spans.
And by the way, if you want a topic closed, all you have to do is say so, and Jack The Magician, our magic topic-closing fairy, will grant your request.