"O-okay... I'm not going anywhere." Andrew does calm down at Buffy's response. Maybe it's because she's not getting mad at him, or maybe that authoritative voice, or possibly that still-surprising fact that they're actually friends now. In any case, he does as she says and waits for her. Granted, he's being very impatient about the waiting, but he's doing it. Though he can't help opening his door again, just a crack, to get a look at the scary Warren ghost... It's really creepy...