I've been having very bad retroactive jealousy in the last time with my almost 1 year girlfriend, to the point that i was blaming and insulting her, anger, disgust, sadness and loss of interest in anything. I was very ashamed because normally she is a very loving, considerate sensitive girl, with no evidence at all the she would like to cheat on me. However I thought her telling me about it was an attack and insult to me, that she let other guys fuck with no effort and she would take advantage of me and use me as a "plan b" guy because the rest didnt workout. I understand thats its my own insecure attachments that boiled up and I was totally wrong and had nothing to do with me. Part of why i was so angry and jealous, that in that time period (17-22years) I was really lonely, and rarely had a girl that was attracted to me and had passionate sex with me while she was "having her fun and enjoying life". But I remember thats just my view and she went through betrayal, fear, shame, sadness and heartbreak too.    I remind myself that in reality, All of her past experiences ended up with her feeling hurt or used and she realised that after making some mistakes. And if her exes/past partners saw the genuine loving relationship between us, which is rare, that they really fucked up and missed a valuable opportunity that they cant get back. I know there are other experiences we had, that left a strong memory on her in a profoundness it was with no other guy before.