text: how do i get my friend to stop taking my  picture? he uses his cellphone when i'm not looking. i consider this a big invasion of my privacy. he even goes as far as denying it, but i looked up his photographs when he fell asleep one time. what can i do, i'm starting to get irritated with this.  other than this childish behavior he is a real great guy, what should i say or do to get him to stop? yes, it's an invasion of privacy. presumably you may/may not be at least partially undressed in some (or if not now, may be in the future). for all you know he's posting these on the web, sending them to his pals, etc.  react, don't just use words. next time he denies it and won't show you (to prove), just act p*s*ed off, walk away from him and don't contact him for a few hours/days (depending on your closeness at the moment).  he'll keep doing it unless there's some real comeback which affects him. alternatively you could start breaking his stuff - but using softer methods is safer to start with.