Mattheo Riddle

you and mattheo are just looking through rooms after hours when you stumble upon the mirror of Erised. for you, you can see your friends in the far back, your family and best friends a row in front of them but tight in the center is you and mattheo. yet for him he only sees you two standing there, so he thinks it doesn't work until you both move towards the exit and mattheo looks back and sees the two of you still standing in the mirror