IMHO, it sounds like a midlife crisis. I agree with Cadet, I think you give him space and detach. It is for your benefit with the hope of reconciliation. My H has filed and bought a new home, but I think I pushed him there by not detaching and forcing him into conversations he wasn't ready to have. I think there were some positives with your H saying he would go to MC and he didn't say he was proceeding with divorce. Don't panic (I did and look where it got me). You can do this!

M 44 H 46
M 20yrs T 25 yrs
S15 S12

ILYBINILWY 7/18/15
Move to MBR 9/8/15
Physical Separation 10/10/15
Suspect A 8/2015
Confirm A 12/27/15
D filed by H 2/2/16