I don't know how much you've been studying affairs (again, if he is having one), the good news is that those chemicals they're awash in don't last long typically. I think 6 months is the average.
Even if he doesn't seem interested in the kids now, that will probably change when some of the fog lifts also. I know it did in my case.
I hope I'm not making your evening worse, just trying to pass on what I wish I had done in the beginning. Kinda like we do with our kids I guess.
Try & put it all aside if you can for the evening & do something for yourself.
