Hi there. I know I'm new and I should do a welcoming thread and such but... oh well I registered just to reply to you so that's what I'm going to do first.
Okay so we have the typical bullying 'friend'. First step, you should already know that she's not your friend anymore. If he's doing that, and he's hurting you for fun, then he's not your friend.
As it's not what it's supposed to be good, I'm not going to give you advice on punching/kickin him b'cause the aggressivity is not good (or so we're told). But from my own experience (I was bullied all the years I passed on a class, until I left the uni) I know that, even if you don't use physical aggressivity... you can use mental aggressivity. That's is, mental manipulation. You can take your 'friend' apart and talk with him. I'm not to tell you to talk him in a "oh pleaaaase stop this I'm upset I would do what you want" because it's clear that he is doing that to hurt you. If he's a jerk he's not going to stop even if you beg. So you may want to try other methods.
I know it's a matter of the personality of each one, but even if you're not at talking, you can take him to a dark alley, gather all the rage and anger on your eyes and face, and tell him "stop now telling ->-bleeped-<-ty things to people about me, or you'll regret" , he may be the kind of "ahhahahah what're ya gonna do to me?" You can just grin and tell him you have your resources. Like telling him you have some big dude friends who are looking for a nice guy to try f*** and you can tell they can make her shout up. You could actually borrow some online friends for a fake telephone call. Or sending her mom a letter of a schoolgirl complaining about her son abusing sexually, or leaving him in the most pity situation you can think of. That's it, here're some people who just WON'T stop by the good hands, you may have to use the bad hands.
He should freak out and leave you alone, but if he's a total jerk you may want to go a little bit further. (bad hands..)
If he keeps on it, you can start to give him some cake (a reaaaally bad cake:) )
if you're more the kind of physical, you can learn some defensive holds (you can go to a Judo gym and ask a sensei (teacher) to teach you a few defensive holds for the boy who's bullying you in the school, for example...this is not lying after all. Besides I would recommend anyone who have ever suffer from bullying to learn something as Judo or Personal Defense...you won't regret that, the most useful 'sport' you can learn) The good thing about defensive holds are that 1-they do not cause anything like bleeding, bruising, etc, not real damage, just pain. 2-You can have specific control so you can't actually be blamed. I've found luxation holds are the best for this. Like the ones the policemen use to carry the badboys to the car. They're painful enough, but they don't cause any damage if doing correctly. Take him apart, do a hold on him and talk serious to his ear "I already said it. Stop. Or the next time you're gonna be screwed up. This is my last advice"
Btw I kwnow that the best thing is actually try to ignore him, change friends, etc etc. But from my own experience is that it's first him, then others will apply for the "let's hurt Devyn' game. You can talk first privately with your real friends, telling them you're going serious and asking them advice, since they know you and your enviroment better. But if all the patience, ignoring, and good manners fail, then you should try to eat before he eats you completely.
You can go first polite, then serious, then serious seriously, then threatening, then aggresively, then acting.
After all, he deserves the same respect he shows to you... good luck dude.
Oh and sorry if I sounded too harsh. And for the typos...english is not my mother language :/