Answer:
When you need me, you must find me. When you find me, you no longer need me. What am I?
I make things short but I am pretty long myself
I make billions of dollars selling windows. Who am I?
I have six faces but not even one body connected, 21 eyes in total but cannot see. What am I?
I am the state when a person is holding a person inside
They are many and one, they wave and they drum, Used to cover a state, they go with you everywhere.