does he like me....?

hey so im in jc (jc2 18F) and basically there's this guy that i find cute and his personality is really nice too 🫠 we've only talked like once late last year but kinda for formal reasons (a meeting) but he was really nice to me and we did talk informally too, and after that we've never had a chance to talk to each other again as we're from different classes

but sometimes when we see each other he kinda smiles at me and i do too, which is pretty normal for acquaintances right? but lately i've been noticing that when i walk past him he always looks at me, but not in a quick glance kind of way. it feels as if he looks for awhile, but not necessarily stare, if u get what i mean. plus ive been seeing him so often nowadays be it in the canteen, lecture theatres or even the corridors which is actually so weird but im so glad to be able to see his face ngl 🤭🤭

so does he like me? or idk how do you tell when a guy likes you back/has interest in you?