Answer:
I am the best thing that can happen after a stick hits a ball.
Never resting, never still. Moving silently from hill to hill. It does not walk, run or trot. All is cool where it is not. What is it?
In your fire you hear me scream creaking and whining yet I am dead before you lay me in your hearth.
I shoot but never kills
I hold two people together but touch only one.
Almost everyone needs it, asks for it, gives it. But almost nobody takes it.