hints to show a guy u like him?

ok so i have a crush this guy who i wont see next year cause he is going to high school next year and i want him to know i like him so i dont have to regret not telling him. i am like really shy and i cant go up to him. i only see him in the mourning, going to 2,4,5,6 period, and at his lil brothers baseball game. their last game is tues. and i already wrote him a note saying " i never thought id be in love like this. when i look at you my mind goes on a trip. and you came in and knocked me on my face. it feels like im in a race, but i already won first place. i never thought id fall for you as hard i did. every morning i look at you and smile, cause boy you came around and knocked me down." so wht can i do to get his attention and let him know i like him? thanks so much! ;D