i think there is nothing wrong with friendster thingy.. and messaging.. depends hinuon on the type of messages that they exchange.. do not focus on small things.. look at yourself and examine if there is anything wrong with you or whether sobra ra ka ka huot.
just my opinion gurl ha..
though the fact that he changed his password medyo makaduda but you know, ikaw nag suffer ana sa konsumisyon.. just let it be nalang.. you cannot always control what he does and the more you do it, the more na sya ma immune sa imo mga sulti.. so, just keep your cool, talk to him maturely about it. ask him why sya naa mga girls nag message, etc. if he tells you that it;s his bro, let it be. who knows if nagbinuang sya, basin online ekek rana and wala sila personally meet...
bottomline, dear, do not open his email nagsakit sakit lang ka nimo... what you do not know wont hurt you.. right gurl?