This week strive to be consistent in your changes. List them out and then do not waver no matter what he says and does. Act as if you are ok with him moving out, be friendly, happy, be busy. Don't question him, don't snoop, don't argue.
Maybe dont' even do his laundry since he's moving out. Maybe don't clean as much just the minimum cause you are so busy going out (even if it to the grocery !).
Don't aim to please him so much as to keep your sanity. Do what you are able to do and if he gets bent out of shape well just say I'll get around to it.
What other things can you do that are the OPPOSITE of what you normally do? What is the routine he's used to? Change it this week! Change your wardrobe, your hair, your nails, your schedule, etc.
!). 
