Welcome to the DB boards, brian... you will find a lot of supportive and helpful people here...
You indicate you have read a lot of books... have you picked up and read Divorce Remedy? It is a great book to help you work through this and it is the basis for a lot of the support you will get here.
It's great that you've recognized your shortcomings in the M. So now is the time to start working on those things in yourself. That, along with GALing and 180s, as these positive changes in you become consistent and stick... these are things that your W will notice and might go a long way to helping you save your M...
This is often a long, drawn out process so we say this journey the LBS spouse is on (you) is a marathon... time, even if it does not feel that way, is your friend...
So what are some of the things that you are planning to do, to work on yourself...?