GF, sorry to hear about your sitch. It sounds like you've decided to let go because you don't believe he'll change - even though you feel nothing good will come from D? Is there anything he can do at this point to change your mind?
I selfishly ask because my WAW probably feels the same way as you and we're headed for a D. However, being in CA too the laws are so f'd up that I feel I have to D her before we're considered 10+years of marriage and then I'll really be screwed.
Deep down I still want her to come back but my previous 180s (and I've backslided at times over the years) or my LRT have done really nothing.
Me: 35|WAW: 38|D: 6yo | http://tinyurl.com/2dxx7m6 Feb 2006, left, came back in two weeks Aug 2006, left again Apr 2007, filed for divorce Dec 2007, reunited Mar 2010, moved out, filed again