What style of game do you use? That's the most important detail to include here. I'm not asking direct/indirect or whatever; are you doing something MM-based or NLP-based?
If you're doing MM, I can't help you.
You've already got some rapport, you've got her attracted (but you don't have it anchored), and she's open to letting you direct her thoughts (that's deep conversation).
Here's what I'd do: mention the time constraint in passing, when it's appropriate, and lead it to a theme of missed opportunities and how you wish you could have that moment back and have gone for it instead. Can you imagine taking an opportunity back like that, and how much better you'd feel knowing that it didn't pass you by? It's just like what I read in this book the other week, it said "if you were to remember what it feels like to regret missing your only chance to do something, if you were given a new opportunity, something or someone absolutely amazing that can take you in a completely new direction, would you feel it growing inside you that you
have to
do something? With me, it can grow and grow until it's unbearable and you just have to jump on the chance while it's still there! Before it's gone and all you're left with is regret. Anyway, have you seen any movies lately?
Figure out where to do the self-points and cock-points for shits and giggles
