The wrong things...begging, pleading, interrogating, showing weakness, following him around when he's there, etc. These kinds of things will make it worse, and push him away.
I would not contact him. He'll see it when he gets there. I wouldn't avoid him on purpose...if you're there, you're there...and if you're not, you're not. If you're there when he calls, answer it like you normally would.
The main thing at this point is that you take care of YOU.
"Always go straight forward, and if you meet the devil, cut him in two and go between the pieces." - William Sturgis, clipper ship captain, 1830's.
