Bunny suppresses a smile at I wasn't supposed to make it this long. He's smug about having given Dan something - someone - to live for, at proving anyone who looks at the future with despair wrong, especially when that person is the person he wants to have in his own future this personally.

He suppresses the smile because he knows he and Dan just can't ever feel about it the same way.

"It didn't take much adjusting," he admits. "I don't actually know if my people could die of old age. None of them got the chance." He pauses before adding, "and if I weren't immortal, I'd want to be. I love it here."

You know that. He doesn't add, but is sure Dan hears between the lines. I don't get how you don't get it is also there, but they don't need to have that conversation. He hopes.