Shelby,
surround yourself with lots of support.. Its what I am doing. Really helps.
At this point I would suggest doing exactly as you suggested. GAL, drop the rope, go dark and only communicate info re children.

Also protect yourself re financially.

M 43 W 43
S15 S 12 D 10
ILYBNILWY ( Dec 2009)
Sleeping separate rooms April 8 2010.
Sep as of 07/14/2010
W moving out 07/31/2010
No OM confirmed ( yet)