Help me find the name of this movie?

its about a guy who seems a little handicapped and he likes to kidnap girls and he will keep them in a room and tie them up to the bed.. he will make the girl roleplay with him and pretend that he is her boy friend and that he is a football player and she is a cheerleader it turns out his brother is a football player. in the end the parents of the girl mistakes his brother as the kidnapper and kills him instead of the actual kidnapper who also turns out to be a pizza delivery guy who had delivered pizza to their house a few times.