How do i get fromfriends to more with him ?

my best friend bas been flirting madly with me and i realized that i really like him. we have been friends for 2 years. on monday we were with mates and when noone else was lookin he was doin really dirty stuff over at me. i liked it buh when we were walkin home he went back to normal. i dunno what to think i know he likes me but i cant get him to how it i flirt with him but he wont flirt back with me we have amazing hugs how to i get him to do more i am too shy to do anything i ahve tryed but i chickend out