I think when you look at everyone else's situation you need to keep this in mind: every situation is a little different and we all came here at different stages of our situations. I came here after he filed and we were 3 mths into that. If I had come here at the beginning I believe I could have stopped the negative behavior on my part possibly enough so that he didn't leave. This is all hindsight of course.
Now that we are divorced, people have come out of the wood work letting me know that they saw ex with someone like 12 years ago!! I doubt if he was ever faithful. I just don't think he understands what it takes and what "commitment" means, but I digress. You can't say this worked for so and so , so it means that will work for me. People are different, so there is no cure all solution.
I think your best bet right now is to drop the rope. Take care of you and the kids and let God know that you will accept what he gives you. Hugs.
kat
Me-53(and learning!) S24, S21, D18, D17 Just keep swimming, Just keep swimming. Dory