I am not in a position to offer advice but I hear your pain and frustration.
Listen to Az, he is trying to help.
I like you have a M that is missing some important stuff, but is still intact. Intact meaning no bomb drop and no separation.
I too am not willing to have an unfulfilling M, and have been close to pushing the issue. That day will come. Before that I want to really get a life and be really happy. I will use this time to also try improve R with W,
R 25 years M 14 years S11 & S13 Working on it alone since Oct 2014 M in trouble a lot earlier (~2 years) Feb 2016. 1st R chat in a yr. Next R chat Aug'17 Still together