I would say yes to disabling FB. IMO it isn't helpful at all.

Not sure why you want to hide, other than to try and cause concern about your well being and hope that W will contact you or worry about you and that isn't what she needs, nor will it help.

I would not change number, just don't contact W. If she contacts you then you have a choice to contact her or NOT.

M46,W41
D16,D18
M22,T25
BD 11/12
W moved out 01/13
Piecing 10/13
Divorced 01/15
"Whether you worry or not has no affect on the outcome. But, moving forward, letting go, and making changes can."
UrWorthy