School crush

This guy flirts with me every chance he gets in class. And he said he didnt like me to one of his friends. I am just wondering how do I flirt back

if hes really cute I would just play it cool and talk and invite him to a party.you can then get p*ss*d and have a good time! lol. if you dont fancy abit of booze you can just become friends with him and hope he likes you enough to ask you out or something