Struggling with getting back together

We are so happy and things are better then ever but stupid me looked at his phone to see what he was up to when we were broken up. It seems like he was desperately asking multiple girls to hang out (maybe filling a void). He had a picture on his phone of dinner he bought and put in bowls like he made it but from the texts it seems like the girl stood him up. I know none of this matters because it was in the past and we were broken up but it still hurts. Any advice on how to push through it? We were broken up for 2 months. And he never got with anyone or slept with anyone. We broke up because we were both stressed with house hunting and we just weren't getting along.