Im scared and its freaking me out.

ok so a while ago some guy
[I found out he's not my cousin]
tried it on with me.
so the story is like this:
he called me upstairs and I went and he was in the bedroom sitting on the bed
and then all of a sudden he says to me I have a condom do you want...

to use it.
I thought he was joking so I just laughed it off.
anyways I was walking out the room and he grabbed me and put me in an arm lock S=
and then we both fell onto the air bed on the floor
he then tried putting his hands down my top and trying to touch me. it was disgusting because we think of each other like family.
he then tried putting his hands down my trousers and I screamed and pinched his near his 'area'.
after about 20 more minutes of things getting worse I dont really want to say what. he finally let me go and I went downstairs.
please take into account im 13 and he was 15.
ok so my question is what do I do now he doesnt seem to want to leave me alone he added me on msn and bebo and stuff.
and now hes become really protective. like he wont let me go out with anyone unless he knows them.
im just so confused and I want him to leave me alone

my god, that's real creepy! I'm able to relate, tho it was with an ex, rather then a really close friend I see as family! well, hon, if he's treating you abusivly like this, you should get your parents involved and if it gets out of hand, I belive that cops can get in this too!! try ignoring him at first, leave him out of everything, block him on msn and on any other accounts you have! and if he dosen't get the message, be firm with him and tell him you're not interested in him like that, and if he dosen't cut it out, it's the end of your friendship! and if he still dosen't stop! - it's time to tell your parents, you can't suffer this alone for so long! trust me hon, I've been in a similar posistion where I was bruised all over, it was cause of my friends I spoke up! I hope you break through out of this situation!

Don't just try ignoring him go straight to your parents before it gets worse.
You shouldn't have to go through this and I'm sorry that you have to
It's not right at all. Tell your parents and let them get involved
I know it's hard to speak up about it but if they don't do something about
him he can go do it to other innocent girls. I would stop talking to him
when he talks to you don't answer tell your parents what he does
and everything he says so they can help you through this.

The Only advice I can give you is to listen to Loulou Butterfly kisses curiosity!!everything they all said to you to do... DO IT!!!

Please do it!
you shouldnt have to be treated this way!!
this is Sexual abuse its not acceptable!..

please tell your parents, please stop/cut any contact with him, please when you see him, you tell him straight out to LEAVE YOU ALONE!!

TELL AN ADULT!!
((before it gets worse))

tell your mom/ dad then he cant do anything

P.S that is really weird + nasty