Recovering from feelings of marital betrayal must be difficult, but some people have gotten past it.
Depends on what you mean by marital betrayal.
When my partner and I first got together, I'd been out for several years. And it didn't start out as a forever thing, more like "friends with benefits".
I'd had a lot of fun. He was coming out of an unhappy straight marriage he'd been in since he was a teenager. (We were both in our 30s, this was in the 90s)
We both wanted to be married. But I was done with "all that". I've never cheated on him once. He wasn't done with "all that". Once he was sure we were married, he started cheating and lying about it. I wasn't happy about that.
Especially that one time he came home wearing nothing but jeans. He was drunk. The jeans were on backwards and the zipper was down. He was supposed to be at work. And he drove himself.
I was really angry that time.
But I understood it. I wasn't married when I did stuff like that, but still...
Bottom line was, I wanted to be married. And you can't start over every time your spouse exhibits a flaw.
Closest I ever came to dumping his butt was the time he bought a car that cost more than our house. Then quit the big bucks job paying for the damn thing. I was stuck with a 600hp Corvette that cost $1000 month, during the Indiana winter. Those stupid things can't handle an inch of snow. We had to keep driving my 12 year old Mitsubishi Expo most of the time. Until spring, when we could get out from under the payments. About the time serious top out cruising weather arrived we got rid of it.
Now, that's the kind of marital betrayal that really got to me. I had to pay for a monster muscle car I never wanted. Eff buddies I can deal with.
But how much is that goddam car payment?
Tom