I have no specific advice, just general. Hang in there and be patient. Nothing will get better or worse all at once. Each interaction needs to be the best you can make it, but there will be bad ones, don't let them get you down. If you slip up, shake it off and get back to being your best.
Get a life (GAL) to whatever extent you can w/ two small ones.
Do what you can to be the wife only a fool would leave...your best self.
Be the best mommy you can, your kids need you badly right now. Plus, there's a chance that seeing you continue to be great with the kids may get his attention.
Keep posting, hopefully vets will chime in soon.
Me: 34 W:33 T: 10 M: 6 S: 6 D: 5 BD: 5/14 Still together(ish) Not giving up: 7/14 D talk has slowed, a lot. Gradually working on things together. Still separate bedrooms. Slow and Steady wins the race.