Welcome to divorcebusting.com. I'm so sorry that you have this pain and heartachage right now. I'm glad you have some support -- that's really helpful in being able to take care of yourself, and taking care of yourself is extremely important.
While you are in a very good place to be supported in your faith and saving your marriage, you will have to meet/love your wife 'where she is at'. In other words, she is obviously not on the same page as you, and that is going to be challenging, and you will have to be careful how you 'fight'. If your wife is preached to or made to feel condemned/judged while you work through this, it may not work out.
There are folks on this board who have navigated similar waters and they may be able to share their experience with you in a way that will help you.
Hang in there, people here are ready to offer their support and help.
I recommend Divorce Remedy, and that you begin with the chapters on The Last Resort Technique and Midlife Crisis and Infidelity.