Answer:
I mirror your actions.
Tear off my skin. I won't cry, but you will. What am I?
hide me from your parents if you have done bad academically this year.
I start new then become old. Start clean but become dirty. I usually start big then become little. What am I?
Flat as a leaf, round as a ring; have two eyes, can't see a thing. What am I?
What is always coming but never arrives?