Sexual Abus

Im trying to figure out what to do. I was sexually abused by my ex boyfriend and I hadnt exaclty noticed it because I wasnt in the right headspace back then but he would guilt me into having sex with him and hed try having sex with me while i was asleep or when i really didnt want to. At the time I didnt see it as bad but now I realize how much I hated him for it and I would go to sleep extremely sad and disappointed because I didnt want to have sex with him. Anyway I have a new bf now and him and my bestfriend know what happened and they want me to talk to my ex and let him know what he did and how it affected me, but Ive talked to him recently and he said hes happy and honestly I just dont want to ruin his life. I kind of just want to forget about it and just never let him know how he affected me but at the same time I want to do something about it because it was so wrong what he used to do. Also my bestfriend and boyfriend are victims and they think that people like that deserve a lesson or know how bad they messed up.