[She knows there's really no amount of comfort she can try to provide him right now that won't feel empty and meaningless. Loss is something that everyone has to sort through in their own way.]

I don't know how things end for the Doctor. Not the one that left, anyway.

[And that's the heartbreaking part, she thinks. The not knowing. Did he leave knowing how much she cares for him? How loved he is? Does he know what a good man he's capable of being?]

And I suppose with the way things will end up going between the two of us back home, it's for the best he doesn't stay here any longer than he did.

[Maybe if she says that out loud enough times, she'll start to believe it. Her tears say otherwise, though.]