Well, for me (recall I filed for D...), filing for D was one last way to withdrawl, put up walls, and lash out...
It was only after filing that I realized my contribution to this mess, and when I realized that, I bottomed out in extreme pain which allowed a lot of the crap associated with my childhood abuse to bubble to the surface, which made me realize exactly how much help I needed and how my entire life needed to change, not just my marriage.
Even if I hadn't filed first, she would have.
Anyway Arleen, I'm saying his filing for divorce may be another withdrawl mechanism and a way for him to avoid facing any changes he might need to make.
Me: 35 Her (WAW): 34 D8, S5, D2 T:16, M:9 BD + D: 4/3/2015 EA Confirmed 5/6/2015 Separation under the same roof