Hi there, I am new in this forum. I met a guy who made my heart leap yesterday

. he is a staff of a big store, i exchanged a few words with him as i need him to exchange certain items. later we met again while i was shopping in the store and he smiled to me. nothing happened. but gosh, i really would like to get to know him. he is a foreigner (japanese) working here.
i am quite pretty, so in terms of looks i should not put him off. i have never taken the first move in my life, i don't know how i should do it. should i just be frank with him and say i want to befriend him? or should i ask him about items in his store as an excuse just to talk to him?
i am not concerned whether he is already attached or not, i just want to know him, that's all. appreciate any advice you have.