You know I'm there with you. I've been fighting this internal fight over whether it's prudent to stay committed to something that just isn't right now, not to mention something that in the present is really not good. So, where do you draw the line? What do you do once you are beyond it? How do you proceed once you've made the decision that it's not worth living in this sitch? If you're thinking that you are close to if not actually beyond that point, start thinking along these lines. Start walking away yourself in a way you can live with. In a responsible, loving way. This might be what actually turns your sitch around. Then again, it WILL be the thing that leads you into a new and fulfilling life. I'm not saying you should run out and file for divorce - I'm saying that you should think of the steps you see taking to dissolve your marriage and move on. Make an action plan and take it one step at a time. Almost everything is reversible should you choose to do so (except the legal divorce).
“No problem can be solved from the same level of consciousness that created it. ” – Albert Einstein