In this step, you have to act like you hate everything from what he does to who he is...
Show him that he doesn't mean anything to you and that all you see in him is hatred. You hating on him will make him hate you and vióla! You're getting dumped!!
Aren't I a genius or what?
Oh ya, before I forget...
EXPERIENCE: So there was,this guy... Brad, I guess ... I don't remember. But we dated for a week and I got tired... He was cute and sweet but not my type. So I started hating on everything... Literally EVERYTHING!! He thought I was on mt period at first and later he concluded that I was a pregnant and then it hit him like a lightning bolt out of the blues, that I just wasn't interested and he dumped me immediately!!