Despite all the negative emotions, keep doing all you have been doing. When/if he comes out of the fog, you may see the good him again. Besides, everything you're doing is for a better you, no matter what he does.

You'll know when it's really time to drop the rope.

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.