From what I've seen and experienced personally, I'd divide "cheaters" into 4 main groups.
My husband doesn’t fit in to any of those groups, by your argument I can be sure he won’t ever have an affair?
Actually, I’m as sure as I can be that he won’t. I don’t really care if people want to use their own experiences to call me delusional or stupid or foolish or whatever other name in order for them to feel superior. Whatever has happened to them in their lives to bring them to that conclusion is their business. When I look around at my friends, family and their relationships, there has been only one which broke up due to infidelity. I’ve had 4 serious relationships in my long years of dating and have not been cheated on (although I expect someone will be along to tell me some of them must have cheated, I’m just an idiot to believe they didn’t)
As always, you do you. It’s sad that your relationship broke down, but you are not me, and OH is not your husband. I’m happy enough in my life to believe he won’t. Just like I believe my house will never go on fire. If either of those things happen, I’ll deal with it then. I couldn’t be arsed with wondering if that time, he was half an hour late home from work he was fucking a colleague, or if that Christmas night out he met a woman at the bar. That must be exhausting and is not how I’d want to live my life.
A couple of years ago, I learned about that thing on your phone that has listed all the places you’d been. Work, school, Tesco, the odd work trip etc. He went through his and it was literally work, Tesco, home and then we had places that matched where we’d gone out together. Unless he is getting it on with the woman on the check out, or one of the two women in their 60s who are the only women in his workplace, I can be fairly certain he isn’t playing away.