Answer:
When I get closer my tail grows longer but when I go away my tail leads the way.
I am the book one can never finish reading
If you have me you want to share me. Once you share me you won’t have me.
There is one in every corner and two in every room.
If two's company and three's a crowd what are four and five?
No matter how little or how much you use me, you change me every month.
What am I?
Animal
Difficult
Easy
Food
Funny
Kids
Logic