Because how could the end be happy? How could the world go back to the way it was when so much bad had happened?
"No, you don’t, you don’t understand! None of you do - you’re Dwarves. You used to - to this life, to living on the road, never settling in one place, not belonging anywhere.
I am sorry, I didn’t…”
The world is changed, I feel it in the water, I feel it in the earth. I smell it in the wind. Much that once was is lost; for none now live who remember it.
“Then something Tookish woke up inside him, and he wished to go and see the great mountains, and hear the pine-trees and the waterfalls, and explore the caves, and wear a sword instead of a walking-stick.”
 favourite movies: The HobbitIn a hole in the ground there lived a hobbit. Not a nasty, dirty, wet hole, filled with the ends of worms and an oozy smell, nor yet a dry, bare, sandy hole with nothing in it to sit down on or to eat: it was a hobbit-hole, and that means comfort.
'Bilbo, my dear fellow, let us have a little more light.'
Your fantasies merge with harsh realities and then as the sail is hoist, you find your eyes are growing moist
Where does your journey end?
“Go back?” he thought. “No good at all! Go sideways? Impossible! Go forward? Only thing to do! On we go!”
we come to it at last