Like the white rabbit

He hands her the bag. She thanks him. In turning to leave, they find they're heading in the same direction.

His pace is brisk, and she finds she has to nearly trot to keep up with him; he's not trying to leave her behind, but he's not exactly waiting either. As they weave their way through the crowds, she tries to make conversation with him. She tells him about her new job, about how her parents are doing, she asks him about himself. His answers are brief and concise...if he answers her at all.

While she's already passed her street, they've finally reached the point of no return. He makes an offer for her to join him at his next destination, but a quick glance over him and she knows he's not looking for company. She declines, but thanks him again. Without breaking stride or even pausing for formalities, they exchange goodbyes and she turns down the next street as he continues on. She watches his back retreat into the crowded downtown throng of late-night shoppers, then turns to cross the road after she loses sight of him.

She wonders where he disappeared to.
...

There are some people who just want to be left alone, and you can't explain it through any fault of your own. But that's just the way they'd rather it to be, and you have to respect it if you want to remain just lucky enough to catch sight of them once in a while.