Well, if he set it up and you could have caught him in the act then yeah your in teh clear.
But all he really has to do it go QQ'ing to blizz with your character name, a log of you Ims then you BOTH are scewed.
The chance that hes willing to lose both his account and another persons account in one hammer stroke is not very high.
Also, just because he knows your number doesnt mean shit unless you have stolen "real" from him, and if you give it back to him im pretty sure you'll be okay
P.s Your SS doesnt work..and go to verye for this one, hes teh lawyer of mmowned. Idk what his look on leechers is though so be carefull
Peace out.