You were at the library, when after paying for the delivery of a book, a customer left the place forgetting his credit card on the counter. The client was more precisely Zach McLaren, one of the coolest kids in school.

You walked out of the place with his credit card looking for the guy on the bike. When you yelled his name, he turned around and got distracted, and was hit by a car.

Zach passed out, and when he opened his eyes, he saw you. He mistook you for his girlfriend because you had the same name and you looked so much alike.

When Zach's parents met you at the hospital, they immediately thought you were his girlfriend. Just when you were trying to explain the truth, a doctor told you that Zach had a concussion, and that he didn't remember the last 3 weeks.

He thought you were his girlfriend and looked at you with dreamy eyes. He had to stay away from screens for 72 hours and not suffer stress, so you didn't tell him anything about the fact that you weren't really his girlfriend.