(((NG)))- Your kids may seem okay with it but they only think about the moment. They don't think long term. They don't think about the day to day of it and they may not even see how this affects you. Right now this is something new and different. My kids were babies when their dad left so that is all they have really known but if you would ask them, they would give anything to have an intact family. They hate the back in forth and they hate that their father, step-mother and I disagree about so much.
Be prepared because the newness of the situation will give in to the reality. I know you are glad that your kids seem to be okay but be prepared for the fallout.
I am so, so sorry NG. Hopefully once your H gets his time and space he will realize that the M wasn't the problem. In the meantime, you need really detach now and GAL and try to be open to where ever this journey may take you.
I can only imagine how hard this has to be on you. You deserve so much better than this and it boggles my mind why your H can't see what he has. Your patience and strength thoughout all of this has been incredible but now it is time to allow yourself time to grieve what once was...and find hope for the future, whatever that maybe.