Ouch, yes, that one stings.

How about:
"I am so sorry it took me leaving you before you would ___"

Fill in the blank with whatever positive action your spouse has just witnessed, such as:

"... spend time with your children."

Me: 49
WAW: 47
S11, S7
Years Married/Together: 17/18
Bomb: 6/15/07
Separation: 7/6/07
D: 4/3/09

Real love is a decision.
Marriage is a commitment.