My now Husband cheated on me multiple times when we were dating..

There's a lot, so I will try to make it short. While my husband and I were dating last year, he was sleeping with his ex behind my back, as well as flirting with her over text nearly everyday. In his eyes, he wasn't serious about me yet (even though we were dating) and didn't consider it cheating. I didn't find out about all of this until after we got married. There's was only one incident he told me about.. he wanted to tell his ex in person that it was over and he found someone. I asked him to wait till I got back in town as I was leaving to help family. He said okay, but ended up going anyway. They ended up sleeping together and he confessed afterwards. I forgave him because I do love him and saw how deeply sorry and guilty he was.... Moving forward, we got married this year. I was looking at his phone and found pictures of his ex in a locked folder. I confronted him about the photos and the date of the photos. The photos were dated the year we were dating. He said he completely forgot he had those photos, but confessed to seeing her during that time about once a week or less... Now presently, we are happily married still, but my head brings up these memories once in a while and I can't help, but feel hurt. I know for a fact my husband isn't currently cheating on me now and I've watched him change to a better man because of his guilt from hurting me.

Has anyone been able to heal without relying on time? Is there something I can do to stop thinking about the things he's done? I'm not really sure how to " move on", I need advice.