depression doesn't always mean you're sad necessarily 
it means, you're not being distracted you feel completely 
lost.You feel hopeless worthless.Competely alone.
and there is nothing you can do to stop it.
it doesn't come all at once either, it hits you in 
waves of pain and anger and hatred of yourself.
and then it's finished, over but not gone.
it's just waiting to for you to be vulnerable again.