Does he like mee?? or not??

ook there is this guy who i saw last semister, and he is a frnd of my friend, so we know eachothers name and stuff, but never talked. Last semister i saw him looking at me whenever i was around, but when i looked at him he turned away. this semister i have the same cl with him, he is in my math cl, we talked a little, just about work, and thats it, i want to know whether he likes me or not??? whenever i see him looking at me, he smiless n turns away:s, he has this embarred/shy smilee on his face, i dont get it?