All I can say is tell her you're sorry for what you've done, and you understand her decision. You understand the pain you have caused her and reason for her action. That you hope she will change her mind and back out of the D. That you are there if she needs, after all, you owe it to her.
Then give her time to ponder it all out and yourself.
Me 35/XW 33 S13 & S12 M: 10/17/98 OM & S: 07/08 D final 06/09/09 12/03/09 - 06/13/10 "Piercing" 06/13/10: Engaged to Re-marry 10/17/10 06/25/10: Expecting baby #3 2/14/11