You asked what you could do and personally I think telling your W to join this forum would be an excellent idea. If you want to keep this as a place to vent or talk about your situation and have it as somewhere just for you then buy her a copy of the SSM book.
Reading about how both men and women feel and behave is a real eye opener.
Don't ignore this problem because you love your wife or 20 years from now you could easily be one of the divorce statistics.