How do you tell if a boy likes you when he just smiles and looks down when smile at him?

Smile at a boy?  Boy love your smile?  What does it mean when a boy smiles?  Why did girl looking at boy and smile?  Does a boy like you if he smiles at you?  If a boy likes you would he smile at you?  Why does a boy smile at youbut avoids you?  How do you ask out a dude when you are a dude?  Why does this boy you like smile and turn red?  If a dude smiles at you does it mean he likes you?  If your crush smiles at you that mean he likes you?  How can you tell if a boy likes you by the way he smiles?  Does a boy likes you if he plays with you and always smiles?  Does it mean a guy likes you if he smiles whenever you smile?  There a boy at school who smile at you but he sas he doenst like you?  Ders this boy named israel he realing likes to smile at you does he like you?  What does it mean when you look at a boy and smile at him and he smiles back?  If you smile at a guy and he smiles back at you does this mean that he likes you?  What if this boyi like bothers you all the time and you talk and stuff he smiles at you and you smile at him is it possible he likes you back?  How do you know if a boy likes you if he only smiles and says hi but he does that to everyone?