Bullies usually prey on those who don't fight back, tell EVERY adult near you about it, fight back, and don't stand for their shit. This will ward off 90% of bullies. Bullies are just pussies. The only time you have a problem with them is when you take their shit.
(Plus, I noticed from your avatar that you like Naruto. Just remember what Naruto did to those dicks. ^_^)