That is one of the pivotal parts of the story. He felt sorry for the poor creature. By showing mercy, Bilbo started off his time with the ring in a benevolent mood, and was much less susceptible to the evil intentions of the ring.
Bilbo Baggins and Gollum first appeared in the hobbit.
In "The Hobbit," Gollum is cunning, with a split personality that fluctuates between his Smeagol and Gollum personas. He is obsessed with the One Ring and is deceitful in his interactions with Bilbo Baggins.
Gollum misunderstood him. Bilbo was saying 'I need more time.' Gollum heard 'time', which was the answer.
He hated him for taking the ring from him
Considering that he tries to kill and eat Bilbo in "The Hobbit" and hates Frodo and Sam merely because they are related to Bilbo, I'd say that Gollum doesn't like Bilbo.
Bilbo found both the ring and Gollum.
He would be eaten by Gollum
The famous riddle asked by Gollum to Bilbo Baggins in "The Hobbit" involves a hobbit, a fish, and a mysterious riddle is: "What has roots as nobody sees, Is taller than trees, Up, up it goes, And yet never grows?"
The company isn't actually all with Gollum, only Bilbo. Bilbo uses the ring he picked up amid his wanderings to escape, which happened to be the one Gollum was looking for. It turns the wearer invisible.
In chapter 5 of The Hobbit by J.R.R. Tolkien, Bilbo escapes from the greedy hands of Gollum. When Gollum realizes that chasing Bilbo is futile, he shouts this last line at Bilbo: "Thief, thief, thief! Baggins! We hates it, we hates it, we hates it for ever!," thus calling Bilbo both 'Thief' and 'Baggins.'
who can really tell? but if gollum had not survived the one ring could never have been destroyed.
The famous riddle that Gollum poses to Bilbo in "The Hobbit" involving a fish is: "Alive without breath, as cold as death; never thirsty, ever drinking; all in mail never clinking."