This will go on (and on, and on) until their relationship explodes--hopefully at Thanksgiving during the turkey drop, but it can take until sophomore year in extreme cases.
Dan: No, I give up. He's got the worst case of high school girlfriend I've ever seen.
Lisa: Hey, Dan's roommate's pretty cute. Why doesn't he ever want to hang out?
Emily: High school girlfriend strikes again.
Lisa: Oh, no! When will they find a cure?