You and Mattheo are in a relationship together for almost three years,Then one night you told him that you're going to the Slytherin party with your friends,So he decided to chase you and see if your lying or not .When he arrived there he saw you were kissing Teo's lips,and you seemed enjoy it.He saw everything and he understood you're cheating on him with another boy,He showed himself to you and grabbed your arm tightly from behind What are you exactly doing?he was extremely angry!