You have amazing advice on your threads, far beyond anything I can offer. What I do want to say is that you are an incredible, strong, centered, wise, compassionate, loving person. Your H is an @ss. I'm so sorry that he's behaving this way and he doesn't deserve you in a million years.
I want to give you permission to do whatever you need to do for yourself. You don't need to be upbeat or kind. if you want to be distant and quiet-- by all means. Focus now on what you need to get yourself through this crisis, lean on friends and family, talk to your L and protect yourself. The "business relationship" model has been a helpful way for me to think about D.
Don't second guess what you said or didn't say during the talk-- in my experience saying less is always better if you can manage it. So you did great.
Can you think more about your story now and what you want it to be, rather than being so tied up in his?
xoxoxoxo M thinking of you so much right now. I wish I could give you a hug and bring you something lovely to eat.
Me (46) H (42) M:14 T:18, D9 & D11 4/19 - 12/19: series of escalating BDs 9/20 - present: R and piecing