I need your advice plz!!!!!!!!!!!?

i need to now if this guy likes me. well see this guy asked me out and i said yes then i gave him the rejection hotline. so then i broke u[p with him. then he asked me out again and i said i only see him as a friend. now i had recieved a flower from a guy for valentines day (it was white that meant that the person only saw you as a firend) so this guy thought it was pink from his distance. so he wanted to now the persons locker # and combo. he was threatning to hurt the person. then today he had asked someone if they new my locker number and combo. he wanted to leave a dozen roses in my locker (which is relle kinda romantic) but i only see him as a firend. HE IS OBSESSING OVER ME. what should i do. I ONLY SEE HIM AS A FRIEND!!!!!!!!!!!!!!!!!!!!!!!!!!! when will this get through his head.