What does that mean if the guy you like stares at you at least once a day?

This can mean either two things. The first thing is that he likes you back! People tend to stare at other people they find attractive. Second, he might think you're weird. People also stare if you have webbed feet or a big pimple. Check your face and outfit in a mirror. If you look completely fine, assume that he likes you. If Mr. Pimple has made a reappearance...well then, good luck!