I have the same problem too. Even though I don't go out unless I have too, at school sometimes I get asked, ''How are you?'' or ''How is everything?''. I always say I'm okay, but deep down, I'm not okay. I don't want to tell people how I really feel because I'm afraid of what they'll think of me. And sometimes people just dig and dig and dig away at you to find out why you feel the way you feel.
Anyway, Tinkerbell is right. You can always vent here. Were always here if you ever need an ear.