Thanks everyone for responding! I will check in here occasionally and let people know how things are going, especially if there is an improvement in my relationship.
As long as my wife is still living in the same house, I will maintain hope that things can turn around. I have thought about asking my wife for a divorce, but I always think that maybe in another 3 months things may change and that she might soften her position.
In the interim I will continue to DB, work on becoming the person and parent that she always hoped I would be and not give her any reason to think that she has made the wrong choice by staying in our home. Everything else is outside of my control.
I want to be able to look back at this point in time 20 years from now and know that I did everything within my control to try and save my marriage. Knowing that others see hope in my situation gives me additional strength to keep working through this. Thanks again.