But without diminishing how stuck and resentful and hurt and angry you feel (and rightly so) and the concern you still feel for your H's mental and emotional state and what lies ahead for him (which shows how kind you are) maybe reframing things will help?
You are moving forward not because H is broken (that makes it about him and makes your actions dependent on his state) but you are moving forward because you want something other than what is on offer to you now.
I guess one is moving 'away' from something - and that something remains the focus - and one is moving 'towards' something - and the 'towards' is the focus.
So - what is your 'towards'? What would you be looking for in online dating? What work and life patterns are you going to build when this awful pandemic is over and we all have to create our lives again? You'll have H out of your hair and off your plate before too much longer. Which gives you so much room for joy.