you and Mattheo both attend hogwarts, and were both slytherins. You've been enemies since first year, your now in sixth. Since this year he had grown a soft spot for you, but didn't show it to you. So you didn't know. One day, you were at a slytherin party when a random guy came up to you and started flirting with you. When you looked around the room you saw Mattheo. He didn't look very happy, jealous even.