Bilbo is pretty unhappy throughout most of 'The Hobbit', so I don't know whether you'd say he was more unhappy in Lake-town than any other point. Tolkien mentions several times that Bilbo is hungry and tired and wants to be at home. He catches a cold whilst riding down the river from Mirkwood, so this might make him a little miserable, and I think he might also feel that the dwarves and the men of Lake-town were getting a bit carried away with all the old stories and forgetting that in fact the gold they want is guarded by a dragon, and they still have no way to get him out of the way.
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Bilbo wants to go away to see the world outside the Shire. He says that he has felt worn out recently, "like butter that has been scraped over too much bread." He also is a hobbit that likes adventures.
HOPE I HELPED! IM READING THE THE OF THE RINGS TOO, I HATE IT!!
Shortly after Thorin's party camped on the mountain, Smaug attacked the town causing massive death and destruction. The men of lake town assumed that Smaug's attack was in response to Thorin's presence on the mountain, that Thorin's quest had provoked the dragon - which is more or less what had happened.
Bilbo got sick while they were all escaping the elven prison. He spent a good deal of time hanging onto a barrel while floating down the river, then had to hide in a boatful of fish to get into Lake-town.
Because he missed Bag End, Hobbiton, and the Shire! And at times, he was getting rather sick of adventures.
Bilbo was unhappy because Gandolf left and he was very upset. That is why Bilbo I think Bilbo was unhappy
because the water would put him to sleep and carry him down the river and kill him.
Because Bilbo wanted to sneak away from the camp to go see the Dale men, and he wanted to do it in secret.
Eat them.
The Took genes, huh? Well they created in Bilbo a certain sense of curiousity, and a love of adventure. It was that sense of adventure that finally got Bilbo to go along with the dwarves on their journey to Smaug's Mountain.
Bilbo becomes very fierce when he kills the spider who was trying to capture him. This leads him to rescue the dwarves by killing many spiders and leading them away. He becomes the dwarves leader, and they follow.
The dwarves were cheerful because they had finally taken their kingdom of the Lonely Mountain after the great dragon Smaug was defeated by the Lake men. Bilbo was unhappy because when he was back at the shire, he always wished to go back and see the dwarves of the Lonely Mountain and wander the paths of Mirkwood.