How do i get my crush into me?

i am sorta friends with this guy i like, and he says we are friends, but i want him to notice me more. thing is, im not into flashy things, i usually wear a t-shirt and jeans and i don't stand out to much as far as looks go, but i always smiling in school... and i mean always. what can i do to make him notice me and think about me more?... please will mostly guys answer me cause i've gotten advice from other girls and it didn't help...