Update.
Not sure where this separation is leading.
Sometimes it feels better than others.

I miss my kids when they are not around.
They miss their mom for a short time when they are first with me.
Wife seems about the same, not much change.

Me: 41
W: 41
Married: 17 years
Together: 19 years
16-Sept-2008: "W: I want to move out."
16-Jan-2009: Separated, wife moved out.
31-Mar-2010: W, and kids move back home!
D 14
S 12
D 11
S 7