Answer:
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?
I am an instrument capable of making numerous sound but cannot be touched or seen.
I am the kind of dog that chases anything red. What am I?
I always follow you around, everywhere you go at night. I look very bright to people, but I can make the sun dark. What am I?
I have a small hill with seven holes. What am I?
No matter how little or how much you use me, you change me every month.