For context, we were together on and off for 3 years. We had a difficult relationship at times but we both agree it was more good than bad. We both had a lot of issues going into the relationship but both worked to grow and heal to be better partners. Ultimately we both hurt one another and it made the relationship toxic. We ended things, but we’re on and off for awhile. Eventually we did finally separate but the kept the door open. I wanted to get back together but my ex said he wasn’t ready, but that maybe we could reconnect one day once we had both done the work to be better and make the relationship work. A year after splitting and 6 months after not seeing each other, I went to see him. I let him know that in our time apart I did date someone from my past for about two months and in that time frame we slept together twice. He says this is a deal breaker and he can never be with me again. That I “gave what belonged to him to another man”. That I threw away my relationship with him for nothing. He says I’m likely the love of his life and he wishes there was a way forward together but he doesn’t believe it’s possible. I think this is ridiculous, I could understand if I had cheated or slept with a bunch of men. But I dated someone who I had dated in the past. I can’t wrap around his point of view. I’d love more perspectives from men specifically and maybe some advice on how I can fix this.
Edit to add, he says he has not slept with anyone else.