Answer:
I make a loud sound when I'm changing. When I do change I get bigger but weigh less. What am I?
I am a protector. I sit on a bridge. One person can see right through me, while others wonder what I hide. What am I?
Die without me, never thank me. Walk right through me, never feel me. What am I?
What room do ghosts avoid?
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.