Yesterday my supposedly best friend sent me a letter, in which she confesses to having had sex with my ex-boyfriend on a number of occasions. He and I did not part amicably and I still feel a great deal of regret/hurt/anger/ about the relationship. I've found a great new love, but I'm obviously not done dealing with what I went through with my ex. What makes matters worse is that I have tried to call her, e-mail her, MySpace message her for over a month, but she was probably too scared to contact me. And now this.

My question to you is what should I do? I already sent her a letter, explaining how angry and hurt I am. I feel betrayed and stupid for trusting her. We've been friends for seven years, and she's not even in love with my ex — she was just desperate, I guess. I tried to call her yesterday, and she didn't pick up. Is she a friend worth keeping?

[EDITOR'S NOTE: To be involved in more GROUP THERAPY, click here [1]]

Source [2]