Internet relationship...

One of my brothers friend met me around two years ago, and ever since then we've always talked via msn and texts.. and that's the only time I can be myself and act normal. I hate it. I am in love with him, and I've met up with him loads of times but when i did I didn't speak very much.
After one year our relationship started to become reckless, he lives near me around 20 minutes away and I see him around. If I upset him by accident or anything he comes back to hurt me 10 times worse.
I ended everything completely around 4 months ago because I knew I had to. He's a very intelligent boy, and it's scary when I think how much his intelligence reminds me of my father who abused and did much more to my whole family.
I think he is a very disturbed person. But I love him so much. I want to be with him, but i know it's not good, so I don't want to be with him more...

Last month he added me on MSN as a 'different' person. Saying 'me and my friends did a dare... to add every girl we USED to love.. congratulations', not even from this but when he added me and said 'hi' i knew it was him.
I deleted him and thought nothing of it and just thought he was bored with his time.
But since we 'broke' up he became more close with my brother, and just recently he added my sister on facebook and became close with her...
He's now 'best friends' with one of my best friends.. who i completely don't trust anymore.
I decided to think nothing of it, but I'm realising.. maybe he is trying to do something or he's obsessed.
I've told no one.

I don't expect any result but I just want peoples views on this.
Thankyou.

This is really strange to me. One thing is for sure, let him be. I would ask your siblings if he is asking about you. If you are still young and living at home, I would bring this up to your parents. Keep posting.

Do you think he can still hurt you?

Not sure about this one either.
He sounds a bit childish.
I'd let it go, and not bother with him or your 'friend'.
He can't really care for you if he's vengeful. It sounds like he's playing mind games with you. The beautiful thing with mind games is it take two to play them, so don't play.
As for your friend, people can change dramatically over their teens/early 20's. If you don't trust them anymore I would leave them be, but not make a big fuss or anything over it.
How close are you to your sister?
Is she older or younger than you?
Does she know that you two used to be an item?

Whatever the circumstance is, don't let it get to you. Instead concentrate on doing things that make you happy and add meaning to your life, like sport, hobbies, school or family events. Surround yourself with worthwhile relationships with people who genuinely care.

Thanks for the advice and I think I will leave it but it just sometimes bothers me, I just wanted to see what other people thought and everyone clearly says leave ha. I hope It doesn't get any more worse.

Thankyou,

Hmm, I don't know what you mean by 'hurt' but physically he's never hurt, only emotionally and If he carries on doing these weird things everything will definitely get to me. But I think after a while he's got to get over it or something

Yeah he is most definitely playing mind games, so far I've ignored all of them and hopefully he'll give up.
I'm really close to my sister, she's around 26 years old and she doesn't know anything or much about me and the boy. Although I did tell her to just delete him because he's a freak and she asked why but I didn't give an explanation and expected her as a sister to just do it because she knew I was upset.. but she hasn't. She may have an idea that I had a relationship with him but I don't think she's really bothered or thinks it's of any real concern because he's my brothers friend.

Thanks for the advice, I'm trying not to let it get to me and hopefully he'll give up eventually.