Search Results: staring at eachother

I remember matching this guy on tinder and like a couple weeks later we happened to bump into eachother in the caf (college). I probably glanced at him for half a second and recognized him but was not staring at all, and went back to staring at the wall while in a long line. But next thing you know (i think his friend pointed me out) he’s just staring right at me with I guess a focused look on his face for what felt like 2-3 minutes at least. I looked around avoiding eye contact but eventually just looked at him and he didn’t even try to look away. Just kept staring. Then it became an awkward stare down and I just did that awkward tight lip grin and looked away. (I had a crush on someone else at the time by the way so I didn’t really care but it resonated with me). So like, did he recognize me from somewhere (in this case Tinder) or do you think he is genuinely attracted to me and was “captivated”? Guys get these resting bitch faces too. (I’m into him now and kinda talking to him atm but I’m just curious given when it happened before all this. Also I’m not even sure how into me he is rn.)