Answer:
Flat as a leaf round as a ring. I have two eyes but can't see a thing.
I am used for light yet I am solid. Without me you would feel enclosed. I hate being touched especially with a lot of force. I like to be in buildings.
I run through hills. I veer around mountains. I leap over rivers. And crawl through the forests. Step out your door to find me.
My first is high my second damp my whole a tie a writer's cramp.
When I point up, it's bright. When I point down, it's dark. What am I?
No matter how little or how much you use me, you change me every month.