look just because he doesnt want to date you doesnt mean that he doesnt like you , perhaps he see's you as a sister, or that he just doesnt feel that spark. Here do this for the next few days wear something sexy and revealing/slightly ****ty but totally ignore him , like hang out with your other friends , he will begin to wonder why you are not talking to him and when he starts to wonder about you then that means he is thinking of you, and pretty soon he will be thinking about you alot while he is alone in his room