ITA!! I can so relate...hey gal, i know how you feel. just broke up from 4 yr relationship. we are not on talking terms so i don't know if he's moved on but all i can say is that as much as it sucks now, you'll move on and it'll all be a distant memory in time.
just think abck to ur past bfs and how it doesn't matter or hurt anymore now.
and the fact that he's moved on to someone else means that you need to do that too. if he could get over the relationship that quickly, he's NOT WORTH any tears or pain or being in love with. that's my take
my pain mainly stems from my own stupidity at wasting all the time i did with my ex
*HUGS* it'll get better. go out with your friends and do fun stuff. it'll help you =)