Answer:
What gets bigger the more you take away from it?
One might hang a locket from this
You speak this when you are being sincere.
Each morning I appear to lie at your feet, all day I follow no matter how fast you run. Yet I nearly perish in the midday sun.
Mostly worn by women or girls, this is sometimes shiny like silver or gold, and sometimes it is made of pearls.
What do you purposefully put lots of in and on your body, but run away from when you encounter it outside?