Answer:
They belong to me; they belong to you; They can make you feel happy or make you feel blue; They never end until the day you do.
A home of wood in a wooded place, but built not by hand. High above the earthen ground, it holds its pale blue gems. What is it?
Runs smoother than any rhyme, loves to fall but cannot climb.
Many have heard it, but nobody has ever seen it. It will not speak until spoken to. What is it?
My first half is normally made of stone, my second is crazy, and I taste sweet when complete.
I repeat only the last word you say. The more I repeat, the softer I got. I cannot be seen but can be heard. What am I?