Answer:
I never sleep yet sometimes I weep. I can get angry or just be happy. Wherever you go, I will follow. No matter what you do, I will be there. I cannot die. What am I?
I'm found on Windows yet I am just a decoration. What am I?
Born in the ocean and white as snow. When I fall back to water I disappear without a trace.
The shorter I am the bigger I am.
I've been around for millions of years, but I am no more than a month old. What am I?
No matter how little or how much you use me, you change me every month.