I have this headcanon that Milo actually likes having Mamoru around but he's just not showy abt it. Like, they're rooming together at a hotel (bc they obvs can't sleep in their parents' rooms) and they sit together on Mamo's bed and they talk a lot.
they know each other since they were little so they’re used being together. actually milo doesn’t even know how it is being without mamoru if not for few months.
just doesn’t notice how much in love mamoru is with him bc he’s dumb like his fathers