@ossobuco,
I'm back home, and have some time before I begin packing for the weekend getaway. So I'll address some things here that may be important for you to get a clearer picture of this whole situation.
To what Osso said: Yes, this hasn't advanced to stalking. Yet. It may never at all. But what got my antennae up yesterday was that this guy was lurking in the cab area around the time I had to catch my office cab back home.
He went over to this random guy and made some small talk, all the while his eyes flitting back to me.
Maybe stalking is the next step on his action plan? And he even owns a bike. So as Chai mentioned, I have to assume this is a stalker and leave no stone unturned.
Also, some people suggested I should go talk to him. Believe me, I'm the sort of person who would not refrain from doing it. I've done it before during one-off instances of guys messing around.
But, this guy has a very psychopath look about him, even though I've seen him indulge in seemingly normal conversations with others. So the point is, I've got to trudge with care. And the fact this state has the highest number of reported cases of acid attacks on women - mostly by men wanting to exact revenge for rejection - in the country makes me make want to make every little move like I'm doing brain surgery.
This is a delicate situation, no doubt, but to get things in perspective: I do tend to over think at times, which I am probably now. I was clearly very upset over this yesterday, but it's much, much better today.