Was this wrong of me to do that to him?

okay well my best friend and me are friends with this guy (but he's super perverted..like very!)and he really likes my bestie...but today we went way to far.he grabbed my friend and wouldnt let go of her..and started...errr... her i guess i should say (but with clothes on) and he did several times while we were playing soccer in PE...he did it in font of everyone.im not sure if everyone saw or not..but my friend got upset and just walked away because she'd been in a situation like that when she was younger.so i walk up to the guy and i said "i seriously oughtta hurt you." so he said "sure.hurt me" cause no one really thniks im strong cuz i dont look liek it.at all.so i kick him...where it hurts and he falls to the ground.i mean was i wrong?i felt bad but that was crazy.he did that to my friend in front of everyone!and she doesnt like him like that.no matter how perved up a guy may be u dont do that to a girl...am i right?was that wrong of me to kick him there?