Every time when he stares at me and i catch him he look away why?

He might be feeling shy or nervous about being caught staring, which could make him look away. It's also possible that he's interested in you but doesn't want to make it obvious. Additionally, he could be trying to gauge your reaction or simply be lost in thought when he looks at you. Ultimately, his behavior may reflect a mix of curiOSity and social awkwardness.