This is a really hard time for both of you, though I can't say that I understand how bad. Still, you should tell her what you can.
Mainly, that you're attracted to her and so that obviously hasn't changed, but that you can't remember your life together. Maybe cut her free from that, if freedom is even what she wants (more likely she just wants her Carol back).
Have you seen a doctor about this? To see if your memory will ever be restored?