The thought that Liz would leave and not return hadn't actually crossed Prompto's mind, but now that it was right there, staring at him from his phone...

He bit his lip a little, fingers starting to tap on the back of his phone, knee bouncing as he sat and tried not to dwell on it.

Take as much time as you need

And if it turned out that that time was a long time or even infinite, well...that would pretty much be his luck, wouldn't it?