I am really sorry that you are going though this. I have nothing concrete to offer, but I do believe that just by acknowledging and offering support, a tiny difference is made.

Actually - I do have something I might like to suggest. Have you told your wife you would like to save your marriage? Does she know? If communication is possible, perhaps you could tell her what you are feeling about saving your marriage without pressuring her. I don't believe that it is ever too late.

My thoughts are with you.