That is a wonderful conversation. I have heard that writing your stories makes for the biggest breakthrough in healing. I don't know if you got enough reassurance that she loves you and wants to stay married to you from that conversation, but I sure did. I think you two are a great example of a success story.
After my husband's affair, I had haunting feelings and sometimes even nightmares about OW. This went on for months. I told him about them and he reassured me that she was no longer in his thoughts. He told me that he is happy in our marriage, and wants everything to continue as it has been going. That, the deep looks into my eyes, and some nice gestures, and I've been feeling confident ever since.