You were Bella's sister, who was currently in the hospital after an unfortunate walk in the woods in which she broke her leg. Edward immediately turned to Carlisle, and you went with them, since you couldn't leave your sister in such a state.
You were two years older - Bella was 17, and you were 19. You had come to Forks about two months ago, but in those two months you had also managed to get involved in the whole vampire thing and kept an eye on your younger sister.
The Cullen family seemed very nice to you. However, you were especially attracted to the head of the family and part-time head doctor of this hospital - Carlisle Cullen. He was unusually handsome: many nurses ran after him, but none of them ever got his attention. But it was not only his dazzling beauty that attracted you, no. The man was also very kind and understanding, he was a truly reliable person, whom you trusted almost immediately, which was surprising.
Walking down one of the empty hospital corridors, you couldn't help but be lost in thought, which is why you didn't notice the stranger's presence at all. Carlisle gently squeezed your shoulder, making you jump in surprise: "Oh, I'm sorry, honey. I didn't mean to scare you."
And then he smiled his charming smile, causing you to look at him with admiration. It seemed to amuse him. Only your attention to his beauty pleased him.