At the party you talk to everyone. She and her girlfriend get high outside. You drink, are bored and elated.
Suddenly she's teasing you for being pale. And then her dress is being pulled up her thigh, by which she ostensibly means to show you how "pale" she is too, but which unmistakably has a different emotional effect than that. Without doubt.
So that in the morning you arrange a later departure, just to see her again. And she's there, and she lights up to see you. And you sit with her until you have to leave. And you can't sleep that night, either.