Its clear you will have to be the rock in this situation. Don't let him push/pull you. He is trying to test the boundaries based off what he feels moment to moment. He's lost.

What is your plan for dealing with him and his instantaneous changes?

Me: 32 W: 29 T:8 M: 6 D4 S2
M - 8/2008
W is not happy - 1/2014
W wants D - 9/2014
W moved out - 11/2014
D filed - 1/23/2015
D'ed - 2/25/2015
Gave X the Letter - 11/10/2015