I Love Her, but Our Past Is Destroying Us

I need to get this off my chest. I love this girl so much, but our relationship became toxic, and we had to part ways. During that time, we both started seeing other people. Eventually, we found our way back to each other, but the past kept haunting us. We argued about what happened while we were apart, and it only made things worse. Now, we’ve decided to go no-contact to heal, but I can’t do it. I love her deeply and want us back, no matter what. I’m lost and don’t know how to fix this. How do I move on when I still want her back so badly?