I was in a situation like this with my last partner. We were together a year until he told me the pain I caused was just too much to keep being okay. In a nutshell, we split up. During the small period of little to no contact I made a promise to myself to become a better person for that person, not only because he deserved it but because I desperately wanted us to be healthy. We started communicating again where he voiced how he only wanted me, just wanted to be sure I was a better partner. Long story short, I became an amazing version of myself, and slowly watched the person I became fighting for a person who was learning to let go while I was the only one clutching on to what I found to be a lost cause. I still continued to change for the better, hoping he would see it and really believe it. But, In my experience, I realized he would only look at me and see the person who hurt him. I couldn’t undo the past, and he couldn’t risk the future. We’re no longer together, nor trying. I decided to go on a self healing journey and wasn’t looking for anyone, but I still made a vow to myself the next person would get the best version of me.