Hi Ammo. Sorry to hear you're spinning on these things. This sucks to be sure, but you'll find that divorce would NOT be easier. It's not even really helpful in moving on from what I can see.
Be good to your daughter and to your W. This may be a temporary situation and then it may be a permanent situation. It WILL be permanent if you act like it is (self-fulfilling prophecy right?)
GAL and setting boundaries is very important. Do it. Don't wait for her. Don't wonder what she thinks of it. Be the man and move on with your life. She needs to respect you for it.
Above all else, protect your daughter and be careful what you tell her about mommy and daddy. As much as it hurts, you are the parent and your daughter deserves your very best - she's blood relation and has no choices in this.
You are doing very well judging by your posts. Give it time. Be you. Worry about you and your daughter and let your W worry about herself. She'll get it figured out at some point. But it will be a long time most likely (as in, longer than you'd like). Meanwhile, make the most of it.
AJ
"Our lives begin to end the day we become silent about things that matter" MLK Put the glass down... "Yesterday I was clever so I wanted to change the world Today I am wise, so I am changing myself."