I run away every day and return every night. I am the bane of a flower and a thieves delight. What am I?

Question

You can kill me but you can't eat me.
You use me every day. I am always there.
You cannot get away from me.
If you can't manage me you must be disorganized.

What am I?

Answer 1

moon or darkness i guess

Answer 2

Its a Moon.........................