What should i do if my bestfriends crush likes me?

ight well, i knew this guy ever since i was in kindergarden, and in first grade, we both had crushes on each other, obviously nutting big,cuz we were toddlers :P but then he moved and i havent seen him until now on facebook, we were talking, and turns out we like eachother again. He calls be beautiful and cute, but theres 2 problems, one, we havent seen eachother in person reacently, and 2 my best friend has a crush on him and she being a hater -__- what should i do wen i do see him in person?