Answer:
I am an object which is used in baseball during the day I can't be seen at all
The more you have me the less you see. Shine a light on me and I shall flee.
I am what brings things together. Without me everything you see would be a total mass or debris everywhere. What am I?
If you lose me, you may cause people around you to lose me too. What am I?
My geometry is lost in the night to be found in daylight's break. The rigors of time have torn me to shreds, yet I stand to protect that which lies within. What am I?
No matter how little or how much you use me, you change me every month.