I have a lot of things to work on as well. When my marriage woes first began, my wife painted a portrait of me as the most inept husband that ever existed. I believed most of it. What puzzled me was that it wasn't terribly long ago that she would gush about how easy it was to be married to me because there were no problems or strife in the marriage. How did I become the evil bastard of husbands within such a short period of time?
The truth is that there is a lot of stuff I need to work on, both as a husband and as a person, but I wasn't an awful husband. Once the switch is flipped in a wayward wife, she only sees the bad stuff and makes up a bunch of other bad stuff to go along with it. Internally they have to justify leaving you, so that's what they do.
The point of all of that is, I'm sure there's a bunch of work for you to do, but you may find that a lot of that stuff fixes itself if you go out and get a life (GAL) and get out and mingle and do something fun (preaching to myself).