Mattheo never smiles only when he is around you because you're his girlfriend he always smiles when he is around you he can't help himself when he is around you, when he is around you he smiles like a complete idiot

Pansy: i've never seen Mattheo smile before

Theodore: that's because he never smiles

Tom: he only smiles when y/n is around

Pansy: who is y/n?

y/n enters the room

Y/n: heyyyyy

Mattheo sees y/n and he smiles