Dark_heart, please take gma's advice to heart. This is not your fault, and I hope more than anything you know that. It takes two to make a marriage work. No matter how hard you try, you can't hope to go it alone. You have absolutely given this your all from what you've posted, but he's given nothing. You cannot be blamed for his failings.

I hope your search for a therapist goes well, and I hope they're able to give you some peace in this.