"Well, tell the person in question that you like them an extreme amount, on their phone, late in the day, where they have time and privacy to process it!"
"Oh, and I managed to remember something else. There's an interesting feature of windows in skyscrapers. You have switchable polarization. You can make it so you can see out, but nobody in other skyscrapers can see in. You get all the spacious feelings of huge glass windows, and the privacy of having the curtains drawn. Let me show you."
She walks over to a slider built into the wall. She drags a black bead on it towards the window, on the side of the slider that's colored black. All the windows in other towers visible from Sable's window turn black as well, making the buildings around her look like they're covered in inky black panels where there were huge windows previously, while leaving the view of everything else completely untouched.
"You can't see inside of their homes either with the polarization on, of course. You could walk around totally naked and they'd have no idea!"