Critter Lover,
Maybe it's good that you're so busy at work right now, as you don't have time to brood over things. I've stood in your shoes, packing up and sending my Aspie son to Adult Assisted Living.
Two things that really helped me:
1) Take time to relish the peace in your home. Unlock the lockdown, listen to the quiet, take long hot baths knowing you won't be yanked out of them in 5 minutes to deal with another crisis.
2) When the pangs of missing him feel like they're going to tear you in two, remember the chaos AND the peace, and remind yourself that the steps you've taken are best for everyone.
Sending many gentle hugs,
Trinity