This is how I see your situation, and much of it mirrors mine. It doesn't look good, Lex. But I don't think it will get better until you accept that something is terribly wrong in your marriage, that it hasn't been healthy for a long time, and that going back is not an answer because there isn't something healthy to go back to.
I accept it. She doesn't feel loved so I have failed her. I've been reflecting on this fact for 9 months now. Plenty of emotional pain has been my teacher. I'm working on more effective loving and where to go from here.