SOOOO i know this girl?

Okay I really like this girl (im 14 btw) and i told her i liked her, she said she doesnt like me and she told all her friends. I felt really embarrased so on the way home from school the other day i grabbed her and beat her with a stick. Before i knew it i killed her what should i do with the body i mean should i call 911 or should i take advantage of it for a couple of days? I mean its here why not!?!?