I am sorry to read this it tears at my heart. I was in your situation except it was revearse and I was going to divorce him. He hurt me so bad I could barley breathe. I felt the only choice was to divorce him to rid me of the pain. But he was so broken, so sorry and so loving. He wrote me letters about why things happened the way they did and listened to me rant and rave. In the end it was his humbleness that won me back.
Why does he want a divorce? I am so sorry you are going through this. I will pray for you.