My friends say I've become an emo. Am I?

I have black hair (natural), I'm don't start laughing hysterically at every thing (my friends do though) I do laugh but not all the time and my friends say I always sort of look depressed (it gets really annoying when my friend comes up to me like a teacher an says is something wrong in a really annoying way). Plus my wardrobe is full of black clothes. I don't think I'm a emo, but am I? Good, friendly answers needed on the subject.