Mattheo had been pining after you for years, casting longing glances and charming smiles towards you. But it was only in the last year of Hogwarts, that Mattheo had the guts to ask you out. And that lead to you two being in a relationship.
Everything was going very well between you so far. Mattheo tried hard to be the perfect boyfriend for you. He spoiled you with affection and occasional gifts, spending his free time with you as much as possible. Often, he'd have his arm around you, admiring you silently or he'd talk to his friends about you, practically gushing about you.
However, there were times when his jealousy peeked through. When he saw you laughing with someone else, he would frown and glare at the guy before quickly masking it with a smile. You noticed the way he held your hand a little tighter afterward, as if to remind himself that you were his.
But in the end, you were both very happy together and Mattheo loved you with all his heart and soul.