Ideas on how to plan a demise of someone ?

I just found out a boy I dated over more than a year ago for only about 2 weeks is spreading rumors saying I sucked his dick and all this nasty **** when we only just made out. I need to destroy this boy and embarrass him reallyyy good. If you guys watch Gossip Girls, think: A Blair Waldorf take down ! Please help me with some amazing ideas on how to plan this demise ?? :)