Does he like me? he stares at me and smiles?

OK, so there's this guy that I sometimes run into on campus. Whenever we run into each other, we always stare at each other in the eyes, until I turn my face because I'm a little shy. One time I saw him walking down the same street, and I looked down because I got shy but I looked up and we both looked at each other and he kept looking till I looked away. Other times we see each other at the gym, and I'll see him, and we stare and he smiles. Does he like me? Or is he just attracted to me or what... I don't want to sound conceited but I get told that I am pretty attractive. He's a senior and I'm a sophomore in college. Is he just smiling to be polite or is that his way of flirting or what?

Thanks guys!
Does he like me? he stares at me and smiles?
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