[Probably not that long. He's noticed her here - of course he has - but he's avoided heading over to her so far because he's not sure how it's going to pan out.
Not that there's much point in putting it off. With the nature of their roles and their various friends here, not to mention a certain event planned for this evening, they're going to be thrown together eventually whether they like it or not.
So he smiles as she comes over, though it's not as easy and relaxed as it might once have been.] Hey you.
[And then, because hey, he's still Jack, he looks her up and down with an appreciative smirk.] Nice dress!