I agree with the other posts in the fact that you should grant her the divorce. All you would be doing by waiting is prolonging your healing process. She has made up her mind and that is that. I hate to say it but I do believe that she has someone else. She will not tell you she does because she does not want to hurt you anymore than she has to.

I think you should move on with your life and find things that bring you happiness. A hobby of some sort whether it be painting or even learning a new sport. That will do you good. Physical activity can also help relieve some of your depression. Good luck with everything~