I will pray for you and your's JDM but I think it would help if you prayed about what it was you might have did to make her harden her heart towards you. I'm a believer in that "all things can be forgiven, but some people aren't willing". Pray for your wife yes, but also pray that you will not act/behave in the way that has caused her to harden her heart to you and pray especially that she will come to see a new you, and see that you are not the same person that might have hurt her. I'm sorry if this sounds crass, but there are always 2 sides to a story. I myself am having problems with my hubby, but i'm finding that each person contributes to the problem, thus to solve the problem, each person must contribute a solution. Now i know you're probably thinking "what does this girl know? i didn't do anything to my wife to make her do this or want this" however, you don't have to do anything, she only has to think you did something and thus harmed her with it. If she feels/thinks that you have done something to wrong her, then you need to find out what it was and set to fixing it. Pain is pain whether we cause it unknowingly or not. Sometimes we have to say "yes I can see how this might have hurt you, but this is what i meant... or just a plain I'm sorry that this hurt you" Hope I am of some help and not coming off as mean or rude.
I wish all the happiness in the world on your marriage,
Demetria