While mine didn't exactly cheat, he was disrespectful by showing his attraction to other women a lot. And then say "Why are women so jealous?" while claiming he had no idea why I was upset with him.
About 5 years ago, I finally had too much and started therapy to rebuild my self-esteem. He continued denying doing anything wrong, but I didn't back down this time. Counseling helped him begin to see the effects of his behavior on me, and several years ago he finally broke down, confessed he knew his flirty crushes were wrong and that they were hurting me, but he had always used resentment and downplaying his behavior to justify it to himself.
He apologized so much. Just put his arms around me and held me for hours while we both cried. He took full responsibility and has continued to try and repair our relationship and rebuild my self-esteem. He stopped paying attention to other women, and treats me better since then than he ever did in the previous 40 years.
My husband has done so much to earn my trust again, although I will never have the assurance I should have. I won't let myself have 100% faith in him or anyone else again. I will protect myself now, and the trade-off is worth it.
It was wrong, and I stayed too long, but he told me we could start over and he would make me feel happy and cherished. He's kept his word.
But I keep that photo, to remind me of when I finally realized my value. When I finally loved myself enough to risk letting go of a second-class marriage, and eventually got what I wanted all along. Most importantly, I know I would never wait to be chosen again.
I am enough, and so are you.