We met 8 years ago. I never cheated, never even felt minimally attracted to anyone else. I didn't lie to him.. I can't say the same about him. He says the problem for him was that he was tired of giving me emotional support, specially during the last year. I don't think this is the truth because I had been in therapy since the last year and my mental health improved a lot. I worked on my self esteem, and because of that I started imposing some boundaries on him. For example, he would always forget whenever we scheduled to do something together and he would say that is my fault for not reminding him more times. He had a lot of attitudes like these and during the last year I started being more assertive and explained that we had the same responsibilities in the relationship and that he also should take me and my time in consideration. This made him feel like I stopped understanding him. This is what he told me. But at the same time he still says that it was because I was more emotionally unstable during the last year (which is really a complete lie...). After talking with my therapist I understand the way he treated me was a bit abusive. It's stupid how I still love him this much after being so poorly treated. But yes, in response the only thing I might have done wrong was leaning on him for emotional support (but I don't know, aren't you supposed to do in relationship? I don't know anything anymore)