Bullies are tough. Generaly, the best way to get them to stop, aside from the obvious (which obviously doesn't usualy work) is to beat the holy hell out of them. The tricky part is that if you lose, and if you're being bullied in the first place, you were probably chosen as one who won't fight back because you'll lose anyway, then it'll get worse for you. they'll see that not only can you not effectively defend yourself, but they'll have a good reason to bully you later on. If you win, and that's unlikely, you'll get in serious trouble.
Another way is to simply tell on them, but assuming anone in the school gives a damn (unlikely), they'll get a 2-day suspention max. After 2 days, you can expect more of the same, only worse.
the best thing to do is repetition. If you keep fighting back, and make sure you whack 'em good, at least once each time, eventualy they'll just find an easier target where they don't go home with a bloody nose, black eye, or bruise. If you can hit 'em once each time, they'll get sick of it.
Telling on them over and over and over won't do much good at first, and might make things worse to begin with, but the more they do it, the more trouble they get in. They'll eventualy get that "last warning" where if they mess with you again, they're expelled, in which case you can take it to the police if they try anything out of school. There are no good solutions to bullying, but there are options. Personaly, I'd suggest getting in their face whenever they pick a fight with you, make them hit you first, hten go ape[cabbage], and make sure you lose. That way, they get hurt, you don't get in trouble, and they know you'll defend yourself later. I think that would solve the problem more quickly than other solutions, but there is a risk it would continue to get worse. At the very worst, you BOTH get in trouble, even if you lose, in which case, you get the final warning the same time they do, so just make sure you don't fight back the last time (if it gets that far) and then it's solved.
Anyway, I'm sure that doesn't help, and has nothing to do with what was said before, but I like to rable, so there it is. 8) lol