To me all the dynamic you describe just sounds crazy. Too crazy to fix in a long weekend.
I think the only hope is for the two of you be in long-term couples counseling, where the counselor really gets to know both of you and your relationship in depth.
Me: 50, MLC/WW 45 Young kids Nov 2015: BD1 Apr 2016: BD2 Jan 2017: W filed Feb 2017: D final