Don't let it bother you dude. I'm not proud of how I was at school, I could be a bit of a dick to people and certainly bullied a couple of the weaker kids.
If I could give you one piece of advice, it's that school doesn't last forever. If you work hard now, you'll find that when you grow up and go out into the real world as a young adult, there's so much opportunity to explore the things you truely enjoy and like, all without the stigma that trying to fit in as one of the herd can bring. There's a lot of things I wish I had committed myself to as a kid, but of course I had to be just like all the other 'cool' kids. The more you explore your interests, the more you'll meet likeminded people who will end up liking you for you. Life is pretty awesome, and you have plenty of it to come.