Is AUTHOR wrong in the post ? POST : Thomas and I met about a couple years ago in college. We hit it off great, shared a bunch of interests, just got along really well. He used to bring his girlfriend Erin around a lot and her and I started becoming friendly too and he had no problem with that.

A few weeks into knowing her, Erin told me that she had cheated on Thomas with another guy, Jason, earlier that summer, multiple times. Thomas knew about it and chose to stay with her. He says he forgave her. Yet he would very regularly badmouth Jason to me and other people despite assigning her no blame for what happened even though she clearly deserved it more than Jason did from Thomas's point of view. Erin badmouth him too, even though she was hooking up with him! I even allowed them to color my views of Jason initially until I got to know him (same circles) and he was a great guy to be honest. The whole story just didn't seem right but I ignored it.

(side note: I even invited Jason to a party I was hosting a little while ago and they absolutely lost it with me even though they told me they weren't going to attend anyway.)

Recently I get close to one of Erin's friends, call her Allison, whom she introduced me to and developed feelings for her. I would talk to Erin semi-regularly about this and ask for her advice on Allison. One day, Thomas sent me a rude message asking me why I was talking to Erin so much and that she didn't want to hear me talking about Allison. I was a bit perturbed because Erin had never given me that impression, she was always happy to give me advice about Allison, whom she knew I really liked. Thomas had never ever had a problem about my friendship with Erin: we were close because of similar mental health issues.

I called Erin that day itself and asked her if I was being annoying about Allison. She said absolutely not, why did I ask? I replied that Thomas just told me she didn't want to hear about it and I would rather she conveyed it to me herself. I was confused, he never had an issue with my being close to Erin and I voiced that to her. She told me it was nothing to worry about. I said ok and changed the topic.

Fast-forward a couple of months and neither of them has talked to me for a while. I stopped texting them too, suddenly I get a long wall of text from Thomas telling me that I broke his trust and lied to both him and Erin in an attempt to cause relationship trouble. Well, that explained why Erin wasn't talking to me as well.

I'm not too fussed about losing these friendships because they've barely been in my life for the last couple of months. I personally feel like these are toxic people, especially looking back now at the way they demonized Jason to me and others. I still want to check if I could've done anything different: was it wrong of me to talk to Erin about what Thomas said to me?

TL;DR: Friends with both members of a dysfunctional relationship that has involved cheating and I feel like I'm being blamed for something I didn't do?