Well, she hasn't left. She slept on the couch instead of the floor, and left the tv on all night. I woke up and carried my dog from room to room, so as not to overexcite him and break his routine.
She woke up as I left to ask how to lock the door after she leaves. I only have one key, that's how living alone in an apartment works. So she won't leave until I get home.