Who Am I?

Who am I when I'm yelling?
  My mother, alone for too long.
Who am I when we're fighting?
  My brother, headstrong and loud.
Who am I when we're at the table?
  My father, thoughtful and distant.
Who am I when you say those things?
  My best friend, cringing and waiting for a hero.
Who am I when we make love?
  The movie star I idolized at seventeen, sexy.
But when am I me?
  Me, the composite of those around me?
  When we're laughing about nothing, enjoying what we've become.
    I'm me, just me.