"That isn't what I mean Jack. You can heal your body, never die but there are other ways to hurt aren't there. You're allowed to grieve for her, for those that died."
He says the Doctor is a priority and she knows that its true. The two of them care so deeply for him, never wish to see him hurt, but he has been.
Deeply.
"I don't know. I can't tell and that scares me. I usually know how he is. On some level I could always tell. He's...closed himself off from me. Perhaps he needs to"