Most Helpful Guy
Well that could mean two things: one is that he is interested in you and are trying to test the grounds and see if he would stand a chance or not. This he will infer by the look you give him back. The second option would be that he finds you pretty and is just appreciating your beaty and isn´t ashamed to let you know that. But if it is the second option it won´t necessarily mean he is interested into you, maybe he would be, but more for a hook up kind of thing.