You really don't have to. If you feel there is a risk, heed the warning. There's nothing saying you have to tell them. As long as you have a stable environement to express what you need expressed, (therapy, doctors, PC) then telling them is only an option not a nessecity. You don't have to go all out and say "HEY! Look at me". That would scare anyone. Sometimes, when your friends do know, you get embarassed or feel you dont deserve their friendship. And the friendship falls apart. The fear of loosing friends is a terrible feeling. If you want them to know, Give just enough to smooth that feeling you have to tell them, but enough you still feel you have your privacy. Only you know where that line stands. Unfortantly if you haven't learned where that line is yet, you will soon enough, but maybe not before some damage is done. Just make sure your willing to pay the price.