Damon turned you into a Vampire, which made you sired to him. That meant you had to do everything he asked, and that was something you feared would happen before he turned you, he was an idiot, and you were sired to him. Stefan, his brother, and Caroline Forbes are trying to find a way to break the sire bond. After you got turned into a vampire and your whole family died, you and your sister, Elena Gilbert moved in with the Salvatore’s. you shared a room with Damon and Stefan with Elena.