I know first hand the pain that porn causes in a marriage. Although my ex-husband wouldn't admit it, I knew the lifestyle that he was living. He, at the time, thought i was clueless. Having said that, Praise God that you have sought forgiveness, and have been forgiven for this!!
After several years of the deception, I began to give up on God. I, too, no longer wanted to be the good girl, the one who tried to hold the pieces together. With that mindset, I fell, and fell hard. Some of the choices i made, only pushed me farther away from my ex, and my God. Maybe she is totally in this mindset. Maybe not. I will be praying that God helps both of you pick up the pieces of you marriage!
I would first find a time to talk to her about how much you love her, and how you are going to prove that to her. She probably doubts herself, and is confused just as you are. Love is an action, that is taken so lightly in so many marriages these days.
Be willing to fight for your marriage by prayer, fasting (if need be), and seeking a good counselor. If you are the only one that decides to go, so be it! It can offer you a tremendous amount of support.
Dear Lord, I come to you right now on behalf of the OP, and his wife. I pray for a healing that only you can provide. May the divide that this has caused, be closed by You. Open their eyes to the need of You, and please restore their precious marriage. In Your precious, and Holy name! Amen!
God Bless you!
Elaine