Answer:
Sometimes imaginary and sometimes real, sometimes they are the closest and dearest person outside the family. Who are they?
What goes up and down without moving?
One might hang a locket from this
What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?
You feel this sensation when you are dehydrated.
Break me and I am better immediately set and harder to be broken again.