Answer:
If you have me you want to share me. If you share me you don't have me. What am I?
I am the type of room you cannot enter or leave. Raise from the ground below I could be poisonous or a delicious treat.
I am an instrument capable of making numerous sound but cannot be touched or seen.
In many hall ways you would stand if not with me in hand.
I am what bring things together. Without me everything you see would be a total mass or debris everywhere.
It has no top or bottom, but it can hold flesh, bones, and blood all at the same time.