Checking in with you Sparkls. All I can say is what a downward spiral your H is on and it sounds like OW is adding fuel to a fire burning out of control.
You did the right thing by telling him to wait. You will really need to let him hit rock bottom and it sounds like he is well on his way.
Not sure where you are on your feelings for H anymore, but if you are DBing still, think about how to approach this when you get home. What kind of a reaction would he expect from you? Can you show him a 180 a blow his mind? Be the calm, rationale one, since he is clearly not capable and show him the change in you.
I bet this ridiculous episode and your calm resolve is REALLY going to make him think..."What am I doing?!"
Me:33 H:34 T: 3yrs M: 2yrs H depression triggered and we are "unhealthy": 7/15 H wants to "make it work" 12/28 BD: 3/10/16