I am beginning to feel discouraged that no one has replied, but I am finding it helpful to post for myself.
I went to see a counselor today. He was not particularly helpful, and didn't really contribute anything.
I also got an incredibly long, heart-felt email from my husband. He told me that he did not believe that he could ever change his mind and that he felt no ill-will towards me. He said he is so distraught that this is hurting me so much, but he realized it was inevitable because we have grown so far apart.
He appreciated that I took the time to tell him about how I felt and how I believed we had hurt each other. He wishes we had connected with each other more emotionally. But basically, it's all in the past and there's nothing we can do.