It sounds to me that you do think about it on a daily basis, because you took time to post here. Also, it also sounds like you answered your own question: if religion is stopping you from divorcing, then there you have it.

Why would he meet these people if his intention wasn't to have sex?

So for something completely different, find yourself a copy of the book "Sex at Dawn: The Prehistoric Origins of Modern Sexuality".

The first part is pretty deep discussion of all the work that's been done on whether humans are monogamous. If you are a science type, read that, it's fascinating.

However, for the real kaboom, go to Chapter 22. Basically the conclusion of these folks, and believe me they looked at it pretty hard, is that some societies take sex way too seriously. There are a lot of reasons, the first 21 chapters, for people to want new sexual partners. The book concludes, basically, "what's the big deal". Some cultures accept infidelity as something normal and/or almost inevitable. As long as it isn't thrown in the face of the married partner, it is possible to look the other way. The authors make the case that we, USA in particular, tend to blow up lots of marriages because people are doing what people do and what they are doing does not have to be a big deal.

Now, I am completely monogamous, and I would find it very hard to be in a relationship that was not monogamous. Having studied all of this stuff for decades, I really don't know if I could get to that point.

But, maybe this is how you are thinking? There is the view you have your head in the sand, but maybe your view is that this happened, it's not at the level where you will break up the marriage, and you seem fine looking the other way. Now you probably want to ask yourself, what happens if he keeps doing this.

Bottom line is that what you are doing isn't necessarily wrong.

I think you've converted your marriage into a business arrangement for now, and that's not entirely a bad thing. Sounds like you've reached a level if indifference, which I'm guessing also means you no longer feel love for him.

So yes, you could be over the affair in 6 months if you've completely disconnected from him emotionally and no longer need or want a romantic relationship with him. People get to the point of being done and maybe that's where you are.

I seem to have come to that point in my relationship with my CS. where our relationship is more of a business relationship, than anything else. Call it " looking the other way" or "sticking one's head in the sand", but it works for us. Yes we still occupy the same bed but not for anything but sleeping. I do keep track if where he goes and when...so I know it's not going to happen again...but if your willing and up to keeping up the job of keeping track of where your CS is at all times then all the power to ya!

I think you have been given excellent advice here from everyone. It makes me sad that you would settle like this. If you are so religious, I wonder about the VOWS you both took. He did not honor his vows, so
now what? You go on like all is well???!!

Thing is...that if you're living in denial of his behavior, when will it have affect? Does it need to be when you catch him in his behavior? Does it need to be when you are exposed to serious disease? Is your health, both physical and mental that easy to dismiss? If it is, is that rational?