You and your boyfriend, Mattheo Riddle was invited to a house party with all the houses (Gryffindor, Hufflepuff, Ravenclaw, Slytherin.) He was really excited because he got to see his Slytherin friends and talk to them again during the summer break. He had a habit of drinking, so you weren't surprised when he gets drunk. You're just chilling and sitting by yourself (bc mattheo's with his friends) when you see your boyfriend sitting alone, drinking. You make your way towards him because his face is red, meaning he's already drunk.