Did she cheat on me?

A few months ago I moved in with my ex. It was a really weird situation cause we were living like a couple, doing things that couples do but never really got back together officially, she made a point out of that. I’m very persistent and I really pushed for us moving in together for a while and I think she was confused and scared to end things so she finally accepted. I know it sounds crazy but she had her reasons to be so confused, we had a very bad relationship where I was abusive and lied to her multiple times about other women, after it ended we didn’t see each other for a year and then I courted her for another year without much success, she didn’t trust me and the things I did when the relationship ended weren’t so great either, so it just got worse. She got really tired of my lies and would threaten me saying she would do the same thing to me and mess with another guy, I didn’t really believe her cause she’s not that kind of girl but after another incident when she got really suspicious about something I did, she went out partying with her friends and made out with a random guy. Did she cheat on me? I couldn’t believe that she actually did it and it honestly broke my heart. She says we didn’t get back together so she didn’t cheat on me.
Did she cheat on me?
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