While Dale and Kelly are still on campus, taking their exams, things continue to happen in the dorm.

Sarah has been running away from Riley all day. 

Riley can't figure out why Sarah is acting this way. The reason is simpler than she thinks, moving in with her is just that, moving in, it doesn't mean they have made up.

Since Riley apparently doesn't understand (or doesn't want to), Sarah had to explain it to her again: They will move in together as roommates and nothing more. They won't go back to being girlfriends until she's quite sure that Riley really has left Dale alone.

Harsh reality check for Riley, either she accepts that, or Sarah won't go with her. But what good would it do for them to move in together if Sarah doesn't want anything to do with her anymore? (Is it that hard for Riley to understand that all Sarah wants is that she forgets about Dale?)