I really like Kev's suggestion for giving your W a schedule. Something to the effect of two nights a week and every other weekend is good enough. You don't need to disclose everything to her. If she needs you last minute, she can call you but no guarantees. You can just say that you'll try to work something out if something comes up.
Negotiation is such a big part of marriage. The irony is that once parents split up, it takes REALLY GOOD negotiation skills to co-parent, at the exact time when emotions are running high and all you want to do is get away from your partner for a little bit.
I think we all would be in a better place in our M if we had taken a negotiations course as part of a pre-marital couselling course. That would have saved so many heartaches in my M anyway.
Me:39 H:40 S:9 D:7 First Bomb ONS:June 07 Second Bomb OW: March 08 Separated: March 08 M:15 yrs T:18 yrs H deep into A with OW Achieved ACCEPTANCE May 30, 09