Is OTHER wrong in the post ? POST :  

Okay so all of this takes place back in September, and our relationship is long over (I broke up with him). A little bit of backstory first. I was dating a guy who lived over a thousand miles away, and we only had the chance to meet up for a few weeks in July. We had been dating for under a year when we meet up (10 months) so it had been an entire year by September. Now that we got that out of the way, let's get to the important part.  
This girl (who I'll call Zoe) asked him to homecoming and what he told me is that he thought it was as friends, but then realized it wasn't and I asked him if she knew he was already dating me. He said no, and I kept telling him to make sure she knew and he kinda just dodged it. He told me he was going to homecoming and I asked if he was going with Zoe and he said yes, but as friends. He refused to tell me if she knew that or not. He said afterward he was hanging out with friends and then he completed stopped replying(not that I was spamming him, but I just wanted to know what he was doing) for several hours late into the night. A few days later I found out from his friends that Zoe was telling everyone that her and MY boyfriend were dating and when I asked him about it, he totally denied it at first. I was with friends at the time, when he finally emitted that he made out with her and gave her hickeys (probably more but idk). I had a pretty bad panic attack in front of my friends (they were also his friends) and I told them that he cheated on me.  
Later on, he told me he was really drunk when it happened and that I was an asshole for telling them that he cheated on me because when he did it he was just drunk and that Zoe forced herself on him. He also said he didn't tell Zoe he was taken because he was afraid of her killing herself if he did since she was apparently really fragile. Like a complete idiot, I apologized and tried to smooth things over with my friends but they didn't buy it.  
We dated for another month before I broke it off because of us constantly fighting, as well as the fact he wouldn't let me talk/hang out with my male friends(I don't mean alone, I couldn't go out with groups if they even had one boy in them). Not to mention that from then on he told me to never talk to his friends and he wanted our relationship to be completely private from then on, which felt a bit suspicious.

Even though this all happened a while ago, I'm curious as to if he was actually right that I shouldn't have done what I did, or if I was right. I don't really understand a lot of basic concepts of human interaction, so I'm bad at judging situations like this haha. This is my first Reddit post btw, so I hope you enjoyed it &lt;3