Answer:
So cold damp and dark I am. To stay you would refrain yet those who occupy me do never complain.
I am a mother from a family of eight. I spin around all day despite my weight. Had a ninth sibling before founding out it was fake. What am I?
Lighter than what I am made of. More of me is hidden than seen. What am I?
Squeeze me and I cry tears as red as flesh, but my heart is made of stone. What am I?
Upon your lonely journey I accompany you, whether you travel through endless mountains or seas of blue. Wherever you go, I keep your place. Lost you're not, when I'm embraced. What am I?
No matter how little or how much you use me, you change me every month.