Honestly i say to just step away and find away not to hang out with him. If you guys have similar friends then just find other people to hangout with for a few months and until everything settles down. I know that it's really hard and you still want to be friends, but sometimes when your hurt by someone who is seeing more then one person is to walk away. I was in a similar situation, and i just couldn't handle the hurt and lack of respect. So one day i just stop talking to him. It took me three months to really get the courage to get him completly out of my life but it was the best choice i have ever made. I deleted him from my phone, deleted him from my friends list on myspace and blocked him.
And aventually when i wasnt expecting it, i found some one who was perfect for me. So don't think these is the only guy you can love. There are guys out there who actually respect and love us back.
I wish you a lot of luck starting over, but trust me it is for the best. When you start ignoring him and acting like you enjoy your life with out him, he well try to get back in it, but you have to be strong and don't let him in or you'll never feel better.



