Stargirl Chapter 18 Summary

As the days progress, it seems like they are the only two people in the school. They're lost in a love haze.
When Leo emerges from this haze a bit, he notices that no one else talks to them. This can't be good.
At lunch, he tells Kevin about this, and Kevin confirms his observation and tells Leo that he was hoping that he wouldn't notice.
Everyone at school, with the exception of Leo, Dori Dilson, and a ninth-grader, is giving Stargirl the silent treatment. That means that Leo is receiving the silent treatment by association.
Kevin says it wasn't planned, but little by little everyone has stopped talking to her. Apparently, the whole school was majorly ticked off about her antics at the basketball games.
In fact, it seems like Kevin may even feel the same way. They blame her for their loss.
Instead of feeling like he was in a "cozy tunnel-of-love," poor Leo now feels a "chilling isolation" (18.59).
No one seems to even see them when they pass by. Hillari Kimble does, though. She gives them a nasty smirk.
Stargirl appears not to notice, but the blow hits Leo pretty hard.