After he finished his story and how he killed William, he asked Victor to make him a lady friend. Victor reluctantly agreed and headed off to Ireland to make another creature. The monster agreed to never hurt anyone else and to run off, never to be seen again with his bride.
I'll be there at your wedding night!
After creating the second monster, Victor destorys it out of fear of it being evil. The monster threatens him and goes out to kill Henry.
The monster kills Justine on their wedding night and Victor's father dies of grief.
Because of the guilt he felt, he isolated himself again.
"Misery made me a fiend!" (Shelley 89).
Victor agreed to listen to the story of his creation and how isolation made him become evil and what made him kill William.