well i think you shouldnt let him know right away cuz u might scare him off..and thats not what you want. just hang out with him figure out what he likes doing and go from there..ex: he likes playing sports like basketball you should get a group of friends and invite him for a game...talk to him thats the main thing for him to notice you otherwhise it will sime like you dont care if his there or not..ask him what he likes doing on his free time..questions that see you are interested but it wount like ur being to straight out..just follow your heart..
good luck...