I can't agree with Lynn more. She said it perfectly.
Being gay is NOT a disorder or a disease of any kind and cannot be "fixed". It is the sexuality of said individual and should be accepted as just that...whether it be hetro, or otherwise.
I'm so sorry that this is so difficult for you, and wish there were words to help you along your dispair and heartache. I, too, am going through a divorce. I know of your pain.
Your husband must be going through some awful times as well. He was honest with you regarding this and does deserve the credit for that, however painful it may be.
I agree that your hub didn't intended to hurt you. It must have been a long struggle for him to not only come to terms with his sexuality, but also to muster the confidence to confront you with this.
I doubt that this decision of his reflects his love for you. He had the decency to be honest with you, and hopefully you both can maintain something beyond the marriage.
You need to attend to yourself and focus on what's best for you, now. You're on the right path by seeking support through your therapist, and hopefully that will guide you through.
I hope this helps some. Although, I know that there are few words that may help during times of heartache. Time is your ali now. Allow yourself to begin the healing process. You deserve that.
Shangrala