Hey Opt...what Tal said....let me add this...can you give him a ton of "mental space"? Drop the rope, so to speak? I know in my sitch the tighter I held on, the more he pulled. I know you're facing the demon but IMHO, the better you can let HIM deal with it (and tacitly let him know that you trust him by doing that) the better off you'll be.
Be kind to yourself...the phase you're in right now is truly exhausting (as you know)
Sage
Relax. Appreciate. Be calm. Laugh. Enjoy. Be secure. Be loving. Be loved. Don't personalize. Don't ASSume. Accept. Be grateful.