I had a friend in a similar situation a few years back. He did a rather interesting thing:
He wrote up a contact stating what he would change, given that much of the marital issues were of his own making. I'll not get into the specifics, but he put this in front of his wife, signed it in front of her, had her co-sign it as a witness and they've never looked back, because he's followed it to the letter of the law and has been a much better husband and person for it.
The only reason I even knew about it was that he kept it mounted and framed in his office and I asked about it one day.
To him, talk and promises were cheap, as he'd broken so many to his wife and to himself in the past. His thoughts were if he had to stare at a list every morning when he went into his office and every afternoon as he left it, the promises he made would not be forgotten.
Just an idea here. God Bless and best wishes.
