I actually thought it would've been cute if Maki and Mayu got together. Never been in Saki's exact shoes, but I sure know having an unrequited love for a friend is absolute no fun. (Most of us know this, yes? Haha.)
But it felt like Saki was so wrapped up in her own feelings that she never once really gave thought to Mayu's. It sounds ironic, but her pushing Maki to be with Mayu felt kinda selfish. If I really wanted the best, I'd just keep quiet for both of them. As they say, "by the time you realize it, you've already fallen in love" (or something like that). So let it beeee.
That said, I'm really hoping that boss and her roommate are a thing.
There's been only like ONE confirmed couple, and it wasn't even a couple we were rooting for.