Quick not so fun fun fact, most (not all, but most) guys are so deprived of positive reinforcement like compliments that even a simple compliment like "good job" or "you look good today" can very easily make him start liking you. Nobody rlly thinks about it, but besides celebs nobody compliments guys as often as girls get complimented.
Here is how you can use that, if your crush is one of those guys that is craving positive reinforcement like me, you could very easily get him yo start liking you with just a simple compliment.
Also, for pete's sake, compliment guys every once in a while. We need it.
-cuberdude