[He knows that, in telling her this, he's giving her a chance to make different decisions: to only take Drogon, or to ignore the raven from Eastwatch, or something he hasn't thought of yet. But if it's possible for her to do that, then how is it that he still remembers the same things? She would be changing his past. No matter what she does, he's sure that at least one dragon taken north of the Wall will be felled by that great and implausible strength. He's also sure that she needs to see the Army of the Dead to properly understand the threat.

He tells her because he has to -- because it would be wrong not to -- and because now that they've come this far, he believes in her. If she says she intends to stick to their plan, it must be true.

The tears in her eyes are his fault and not his fault, but seeing them still works at him. They seem to be for her brother, or her dragon, or both. Either way, they're the only answer he sees to his question, and they say to him: not now, and he can't really feel disappointed. He wants to comfort her over something that has left her inconsolable. Everything else says Maybe someday.]

You'll do those things, Daenerys. You've brought honor to your name. You're revered and [a hesitation so slight that it's almost unnoticeable, with no accompanying squeeze of her hand or caress of his fingertip] loved.

[Home, though... to him, that's Winterfell, the only real home he's ever known. It's not her home, so she can't mean it's where they'll go after the Night King is defeated. She must mean that they'll return to Westeros from wherever COST has taken them.]

We can't know how to get home until we know how we came to be here.