Acc, my thoughts and prayers are that you weather this blow and come out on the other side soon.
For me, having "something to work on" gave me a reason and a purpose to feel better about. You've done all the work in the world on how to be a great husband and partner, and you've walked the talk for a very long time.
If I can make a gentle suggestion, it would be to get at the heart of why you ended up with the W you did, and how you came to be married to her for so long and have kids with her. Some things you don't see from the front end that you notice looking back, and some of them will be about you in addition to those things you have learned about her.
You are in a position to be very appealing for someone who can't quite carry their own emotional weight, because you've been carrying it for two for so long and it's what you're used to. Take steps to break that potential cycle.
This post is intended not to find fault with you but to share parallels that I see between you and me, and related advice that I got from my IC.
May your next Mrs not be such a project. She will undoubtedly be lucky, but you should be lucky too.
Adinva 51, S20, S18 M24 total 6/15/11-12/1/12 From IDLY to H moving out 9/15/15-3/7/17 From negotiating SA to final D at age 50 5/8/17-now: New relationship with an old friend __ Happiness is a warm puppy.