So my ex broke up with me in March and we had been together for 5 years, the last 2 of them we were in an open relationship. We had agreed upon certain boundaries and 2 of them were 1. If you’re planning on hooking up with someone/going on a date we have to tell each other that that is happening beforehand. 2. If it was more of a spontaneous thing and wasn’t talked about beforehand we still have to tell each other afterwards. A while ago he already broke the first boundary of lying to me about a planned date and ditching me for it. We bounced back from that after a while. But just tonight I was talking with a friend and they were mentioning a time where my ex had made out with multiple people at a party and then made out with someone else months after that. My friends thought I knew about it but I didn’t know about any of that at all. Would you think that’s cheating? To me, that is cheating. He knowingly broke boundaries that I needed and we both agreed on, told his friends about it but not me, and I found out through one of the people he made out with and not him. I’m planning on confronting him about it tonight but I wanted outside options first.