You are not alone. Many of us are going through the same thing. I feel for you. I think everything you are feeling is very normal. Unfortunately, I don't have any answers. I read the same advice you do with similar effectiveness. In the end, maybe it just takes time. I guess we will find out.
You asked in an earlier post about a book that would help. I got tremendous support from "How to act right when your spouse acts wrong". Since I filed, I stopped re-reading it. Maybe I need to start again; even if she will no longer be my spouse.