Hello everyone. I’m new to this but need advice. I was dating this guy from work and after a month found out that he was sleeping with me and my best friend behind our backs and also found out he is married. My best friend and I decided to block him. Then 3 weeks ago I find out they are talking again after everything he did and lied about. He even said that sleeping with me was a stupid decision. I’m so pissed at my friend and don’t think I can be her friend again. What should I do.