Who am I?

Maybe that’s the million dollar question.
Are you your reflection?
Are you that voice in your head that you hear when you read?
Perhaps you’re your heartbeat.
As you walk in the street, if you think of it; everyone’s seeking a sense of self and that voice is having a million thoughts a day.
Everyone’s having a complex human experience that sculpts their reality.
Maybe we’re all just one being, experiencing billions of lives simultaneously as an experiment.
Who knows?
Maybe we’re just an evolutionary accident; as in the universes lifespan, humanity’s existence is but a blink of an eye in the sense of time.
Now... let me ask, who are you?