How do i do this i really like him and wnat him....but gosh i don't know?

so, i think this guy likes me but i'm not entirely sure. but i kind of want to let him know that i like him without actually telling him..i'm kind of shy when it comes to guys. and we're only in one cl together. i also barely know him so i don't really know how he'll react if i do tell him about my feelings for him.