Not speaking for Still Trying, but I find my self in a similar situation. I agree with a lot of what Dom R says, yeah its better for the kids if you don't separate and stay and work on the M. The problem is you can't work on the M by yourself when the W is dead set against it. Yes you can work on yourself whether or not you are separated. I can tell you from my past 3 months that being separated does not take away the pain or make anything easier. The ? is what will work best for you end goal of eventually getting a marriage back that is good for both of you.
Me - 34 W - 33 S - 5 D - 4 M - 14 years Bomb 1 Dec 06 Bomb 2 Aug 07 Separated - Aug 07 WAW Renting own place - Dec 07