You also say: "Is it my drinking? Is it my porn abuse? Is it money (feeling secure)? Is it just that I am not who she thought I was?"
If those things are involved, of course it would take a toll on her. Are you still doing those things? Then stop.
What is your wife doing and saying?
Forrest, you can do this and it IS worth it.
Do DIFFERENT work.
A lot of folks are able to find help with AA (and there is an online version), Moderation Management, and there is help for porn addiction. Sometimes a pastor or a DB Coach (They are all trained as sex coaches, I believe, and I'm certain Dottie and Jody are). If you prefer a male, Chuck is very good.