idk if I can get past this

Long story short (I have posted before) my fiancé ended things at the beginning of May. We were definitely in a rough patch in our relationship. Fighting, bickering, it just wasn't fun anymore. After we broke up he talked to girls. And I can't seem to get past it. He didn't sleep with anyone, he said. The beginning of July he said he wants to work things out. Now two months later the past is still getting to me. I get we were in a rough patch but he gave up didn't he? He swears he will never do this again and he realized he needs me and loves me. I'm just so stuck in the past and idk how to get away from it. Some days are better than others