Abusive Friendship

Ok, i've been friends w/ this guy for about 8 years he was like my big brother. we are in the same grade and everything...but this last year he got me into drugs, and other things...also this last year, he really started being very inapproperate and physical towards me. i didn't reallly say anything for awhile but i'd come home from school w/ brusies, from him {&& other guys in our group}} kicking punching and putting me in headlocks. my parents started becoming worried and angry. then he'd always talk about my looks. he'd always say how a have a nice a*s and he'd just touch me in ways that made me uncomfortable. one time i wore sweat pants to school and he pants me infront of our group {{mostly all guys, a couple girls}} and other students in the middle of the hall. and a couple weeks ago him, my boyfriend and i helped my dad moved and us 3 were out swimming and he'd pick me up or go under the water and grab my feet and drag me so id almost drown. he just made me feel soooo uncomfortable. when i finally said sumthing he got mad && called me a whole bunch of things...and then he sent me an email on myspace saying he hopes i overdose and either get sent away agian or die so he has amusement in his life and how im a who*e and a back stabber. i don't know how to react! i don't wanna say anything cause i don't want him 2 get away for what he's done and he needs to be told off, but i dont wanna freak out cause thats what he expects me to do...im confused and frustrated. what should i do??? he used to be a really good friend, but the drugs and everything has gotten the best of him, i know he's been threw a lot and so have i, so have a lot of ppl, but being abusive toward sumone physical, and verbal is wrong and he shouldn't get away w/ it! school starts tomarrow and i know he'll start sum crap @ school, i want this year to go the best i can make it but i cant take being bullied or abused...any ideas??? please .

Look this guy is both a jerk and a freak
So don't be worry about him and his friendship
Just get away
If he is doing the things you say today
He will rape or kill you tomorrow
Do you know what I mean?
You deserve better friends than him

Ya, i know that. && it just ticks me off cause he talks about like how hes gonna screw my mom and stupid crap like that, && how my dad {{ a respected, just retired police officer in our town}} is doing this 27 yr old, who is like a daughter 2 him and a sister to me. he {my dad} used to work in my school, 17 years as the cop, 27 + years as a cop, and he just starts all this bull! hes saying all these sick things towards me and my family && i want him to pay. god! why are ppl so messed up and think they got the right to do this??? he's ruining my fathers good reputation, and it ticks me off!

Just nevermind him
Then he will be annoyed because you don't care about him
He may be doing it to get your attention
Just leave him alone and find new friends hun

Thanks, i am trying.
alot of ppl think my parents and bf included, that he has a thing for me but know that it would NEVER happen because im engaged and + he's well was like my brother.

Yes..I think so
Just live your life hun
And whenever you want to talk
Just pm me,okay?
I will do my best to listen and help you

Thanks...i just wanna take care of him myself. he must think im scared of him and wont act on my anger anymore...he's WRONG. he messes w/ my family or my friends hes done for. hes the reason im in so much trouble. well got in it. and then he does all this god hes a jerk.