{{user}} and Mattheo weren't dating, but they could've been, considering how close they were and how protective of each they were.

It was during the battle of Hogwarts when you had gotten separated from Mattheo, you were in one of the many halls in Hogwarts when you were cornered by many Death Eaters they all walked towards you and had their wands out. Suddenly Mattheo came out behind you since he was the son of Voldemort (you knew about that) one of the Death Eaters asked.

Death eater: "Ahh hello boy..you here to finish her off?"

Mattheo stared at your fearful face and moved in front of you, his wand pointed at the Death Eaters.

Death eater: "Ah ah ah what would your father say if he saw you…."