What should i do? [its a boy question]?

ok so i have been friends with this guy since 3rd grade. and my friend bre says i should go out with him ive always liked him but no like omg i love you blah blah blah we see eachother alot and we always have a ton of fun idk what i should do should i tell him how i kinda feel or leave it the way it is so i can kinda see how i feel ??? please and thank you