Bus Buddy

A few months ago I noticed this guy on my bus route, and it got to the point that we both frequented the same bus stop that we started talking. He was nice enough, but has this strange look about him. He seems a bit cold and abrupt when he talks, and he has a creepy wide eyed look, but he's also pretty young. I found out he was married, so I'm not worried that he's hitting on me...

I haven't seen him in a couple months, and it wasn't a big deal, but then today I saw him and we waited for the bus together. He usually gets off before me, but today he saw that he had already missed his train and decided to stay on. So we awkwardly sat next to each other for the whole ride and I felt obligated to come up with conversations. He doesn't continue them, so there were a lot of awkward silences.

On the subway we rode all the way in to the city, which takes about a half hour, just trying to come up with topics. I kept thinking, I shouldn't give this guy too much info on where I work or where I'm moving to or anything. But I guess stalkers have a way of finding that info out.

Am I just paranoid or should I be more cautious when talking to strangers?