Laurie is right, there is nothing you can do. I think I finally realized that when my H told me he was back living with OW.
Let the Lord fight for you. I know it is hard. And I don't know how you let go when H is still in the house, still being so ugly. Ask the Lord to tell you how.
Accept it for what it is. Keep living your life. Find some way to stop letting your H control you. You'll have to figure it out.
For me it was just ending it. I don't even know what that means... but right now I am no longer protecting H, or enabling/facilitating his R with his kids or letting him dictate when he talked to us. It became clear to me that he was controlling me, still. And it was all very negative.
Think... what is one thing that can/will happen for Cathy in the future that does NOT involve H? Even a fantasy? Think on that.
Or... think of GOOD things about being D from H... I've been doing this lately. It kind of makes me feel good. Oh, and watch You've Got Mail... that's a good pick me up.
Do like you did last night... save yourself. When H does not come home, give yourself permission to have a pajama party with Cathy. I am sure you enjoyed your time a lone in the past when things were good with H... give yourself permission to do that again. Stop doing anything just so you can tell H... who cares?
Walk away in your mind. Love him unconditionally by letting him walk this journey without your pressure...
Hang in there, girlfriend.
Relax. Appreciate. Be calm. Laugh. Enjoy. Be secure. Be loving. Be loved. Don't personalize. Don't ASSume. Accept. Be grateful.