You were talking to a Gryffindor earlier about homework. Later that day you find out he was in the hospital wing, not long after you finished your conversation. Pissed off, you storm into the common room pushing Mattheo against the wall

You: ”What the hell Riddle? You don’t get to choose who I talk to! We’re not even friends!”

He smirks at you before speaking

Mattheo: “I don’t care. You belong to me.”