hmm… there’s only two ways i cud think of that he used to do that… one, is that he sent a password stealer that he bind to another program of file… has he sent u any file or program? another way wud be if he ran a key logger on ur pc… if he knew ur password, he cud open ur ym and list ur friends in ur friends list… get it? i suggest never to accept any file from anybody thru net… tc!