Answer:
I am a creature with a โtightโ name.
I regularly change shape yet remain a sphere. I am always there but not often seen. What am I?
What has a neck but no head?
I'm sometimes white and always wrong. I can break a heart and hurt the strong. I can build love and tear it down. I can make a smile, but more often bring a frown. What am I?
As a stone inside a tree, Iโll help your words outlive thee. But if you push me as I stand, the more I move the less I am.
Whoever made me don't want me. Whoever bought me don't need me. Whoever use me don't know me.