((Chris)), I am so sorry you feel alone and depressed at this time of the year. I think Christmastime has been so commercialized and movies about being home with family, etc., that it adds to the pain for many people.
I'm not exactly sure how you meant your statement about being 30 and on the edge of divorce. Do not mark yourself as some type of failure. I'm not saying to put all the blame on your W, but neither can you take responsibility for her actions. Space and time away from her, will help you a lot. You are hurting now, b/c of the recent interactions with her.
I hope you will block her on your phone and seriously start moving forward. Stop listening to her high school tactics.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!