I think children would be best served not by a "stable" but unhappy parent relationship compared to a happy, joyous fulfilled parent situation where they happen to live apart. Think of it this way, most children grow up and emulate the family relationship of their parents, would you really want your children to end up in a relationship like you have currently?
Or would it serve everyone better to have them see you as happy and fulfilled and empowered to live the life you prefer? I'm voting for this one!
Btw, I grew up with a single parent from around 2 til 8 or so and then had a step-father. I think I turned out alright
and have a wonderfully loving and supportive marriage of 8 years now.
Love and Light