Keep rereading and replaying the last few conversations we had when we broke up

I broke up with him and everytime i even try to move on, i remember how shattered and devastated he was when i broke the news to him. The first few texts of him in disbelief and then trying to grasp the situation hurts me even now. Everytime i think of it i can’t forget it. The breakup happened through text and we met too and it was just a sad mess for the both of us. I feel like the biggest asshole in the world. How do i stop feeling guilty and replaying the breakup in my mind over and over again? I still love him so much.