Most Helpful Girl
I'm sorry you're going through this. Your beef is with her, not with him. I'm sure many people wouldn't agree with me, but I wouldn't do it. You'll look like the psycho ex-boyfriend because you don't know what she's telling the other guy. There's really nothing to gain by trying to destroy someone else. Let her live with the guilt and go through the karma. It'll come back to her, no doubt.
As for you...be done and done. Just do you. The best way to get back at someone is to move on. You say you were together for 2 years. I believe she'll try to come back...they always do when you least expect it.