how to let them know your interested

eye contact is one of the main ways to let them know your interested!give them many smiles and glares but dont smile too big because you dont want to scare them away!walk past him many times!these are just little hints or clues for them!!!!
if they respond or smile back or just stare around at you walk up and say hey!great pickup lines are "hey!i like your shoes" or "hey!do i know you" or "do you know where this store is?(any store around)" or "hey!do you know what time it is" or "hey!do you work here?"! these are just reason's to talk to them!hopefully this wil help you!