Welcome to divorcebusting.com; this is a tough place to be. It says so much you are here, trying. I am hoping and praying for you IC will help.
Have you read DB/DR? Both books are great resources. As Saffie stated, forgiveness is difficult. MWD has written an article on infidelity which may give you some insight on H's thoughts and feelings and help you both with the healing process. She has other terrific articles on forgiveness and forgiving yourself.
The people here are simply awesome and will help with any of your concerns.