Should i breakup with my boyfriend? hes kidish.?

im dating this kid, hes rele cute and nice.. but he frigan anoys me he smiles to much.. and hes a year younger them me and hes kinda immature... hes pretty short, but taller then me.. thats kinda sad because im short. but im just wondering should i breakup with him? because he lives in a different town then i do? we dont see eachother often, and he kinda confuses me.. i dont even know much about him.. all i know is hes cute sweet and rele likes me.. why dont i feel the same> meh.... should i break up with him if so how do i say it?