dude i can so relate. like i have this friend who i've trained with since we were level 14 and talked to her everyday. when we pk, it's always us two and i used to trust her a lot. one day we went to the wild, she let me finish off this level 78 then when i got the skull, she pked me. i lost more or less 300k in total. after that day, i never saw her again. some friend huh? but yea just forget about it, ignore him and just keep playing. there's a thing called jealousy/ envy and that's prolly what's consuming him. just remember not to let him affect u. if it helps, challenge him 1 on 1 just for the sake of closure.