Don't file anything - you will regret it. Or take any other "formal" step. There are others here who have filed for D, or moved out, or etc, etc, out of anger, etc. Now, they regret it. The WW drags it out all the time, etc.
Let her take the steps. Distance yourself yes, but don't take any "formal" steps.
Also, don't threaten to do so and don't push her to do it either. That will backfire. That was one of my many mistakes.
BigyBiz, I know. But I feel like I am dangling on a string. She has not brought up divorce. We spent Sunday like a family, not one mention of it. Not to give myself high hopes, but she calmed down. Not sure if that is a good or a bad thing. If you don't mind me asking what backfired on you.
Me: 42 Her: 39 Kids: 2 ILYBNILWY: 5/17/2016 D-Day: 5/17/2016 Verified OM: 5/17/2016 Verified she told OM ILY: 5/21/2016 Moved Out: 5/19/2016