I don't know if I should talk about him with her due to how much he traumatized me. We both dated him at different times but she dated him first. I had a crush on him for 10 years as a kid but he only dated me because I lost weight. The ex girlfriend and I knew him thru our church and we all grew up together basically.

He raped me 4 years ago and I obsess over it most days. 

Just recently she got a job where I work and was really friendly with me. I haven't brought up our past yet.

A part of me wants to let it go. I'm in a better place in my life right now. But the rape haunts me everyday and I wonder if he abused her too. My friends think I should ask her if it's ok to talk about him with her but then a part of me wants to forget it.