What should i do??? i have no clue what to do and i really like this guy?

ok so i really like this guy. i used to date him but i had to focuse on basketball so i broke up wit him. now i really reallly like him but idk if he feels the same way. last time i saw him he kept staring at me touching my hair and throwing skittles at meh.. i really really like him what should i do