You're part of my hearts, Jack, the Doctor replied. I could never forget you.

It was possibly a really sappy thing to think, he thought. But it was how he felt, how he'd felt these last fifty years. The Doctor gave Jack part of his hearts and he never got them back, never wanted them back. He wanted things to be the way they were, he wanted them to be the way they had been, he never wanted it to be over. He didn't want this to be as much a goodbye as it was a reunion.

But he wouldn't think about that. He'd think about this, now.

I want you.