Why do people say I look unhappy and sad?

Anonymous
I do have a habit of crossing my arms in public, but even when they're not crossed people say to me that I look unhappy or say things like 'what's wrong?' or people tell me to smile (they're not usually strangers), when I'm actually either deep in thought or happy. I try and smile, but I can't be smiling all the time, am I giving bitchy stares (resting ***** face)? Or do you think it's just my blank fashion expression?
Why do people say I look unhappy and sad?
6 Opinion