Brother, my heart and prayers are with you. I had the same misfortune 11 years ago. I lost her. Some things I have learned: Don't pressure her. Communicate, but don't pressure. Don't remind her of God's judgement; remind her of His unconditional love. It is okay to send flowers or a gift ONCE-IN-A-WHILE. And, although she may do the wrong thing with the space, you still must give it to her.
This is important: God gives us all a free-will. What many people don't understand is that if He didn't give us a choice, He would be placing conditions on His love for us. Likewise, we must love our spouses (and fellowman) the same way. Even if she has an affair, give her time and choose to love her even when it seems impossible.
That will hurt. I can promise you. If you really love her, you have a lot of pain coming, but God will be with you and He will comfort and provide for you. You will discover ways to exchange the pain for intimacy with God.
Here is the great news: If you don't lose hope, you will come out of this a better man and a better lover. You will discover the depths of God's love like you have never known it before and you will be able to extend that love to others.
If she comes back, she will get a real bargain and, since you will love her in a whole new way, so will you.
I won't comment on the "what if she doesn't" because we are all going to pray that God's will prevails for the both of you and that God will bless you with a true miracle.
Remember, Rome wasn't built in a day. We all want a quick fix, but some things take time. Focus your emotions on caring for the needs of others so that you don't get overwhelmed with your own grief. Be patient and don't allow anger to get a foothold. Always displace it with compassion.
Let me know how things are progressing.
God Bless you.