I would just stare at with a sad look on my face, tears going down my face (crying) then close my eyes and bow my head and sadly (or weakly) say," you don't care," until he feels sorry and finally says something.
This might sound stupid to you but, I would say fuck my life and punch myself to knock myself out and make sure he sees what he has done to me. maybe he would have sympathy. It's almost like suicide but it only caused enough harm.
First, if he did say something, he'd say "prove it". I'd grab him by his shirt and kiss him. Once released, i'd say "i dont care what anyone else says about you. Your still the same MJ to me."
If he didnt say anything, id assume hes shocked that someone would say that to him. Then id walk off and he'd grab my hand and pull me back and into a hug.