HBH, that has been my fear too. My H has kept questioning whether we were ever meant to be together and that we (and therefore the kids) would be happier if apart. I struggle with fear that showing I'm just fine will validate that thinking for him.
But.... the clingy, needy, desperate behavior I made the mistake of doing after the bomb sure didn't help! So.... it is all that is left to do, and I find that I just keep praying for the strength to keep GALing and detaching and that it will hopefully wake him up rather than validate his distorted thinking.
Here is to another day of pulling up every bit of strength I can find in myself from the tip of my toes to face this with a smile and confidence. (whew! this DB stuff is exhuasting!)