The return of Joy's absentee father, just in time for her graduation, leaves Joy with a man in her life she would rather be gone. Meanwhile, the boy she wants back has disappeared again.
The first time Finn disappeared was sophomore year. Three years later, Joy pretends she's gotten used to it, but every time Finn decides to check out for an hour (or a day), her stomach turns itself inside out as she imagines all of the dire situations he could have gotten himself into. To everyone else, he is the All-American boy: soccer star, student council president, and straight A student. But to Joy he reveals the part of him that longs for the sunless days of Alaska, that likens himself to the blue of a drowned salamander. By the time they reach senior year, Joy is starting to feel a nagging discomfort in their relationship: she still loves him as unrequitedly as always, but she cannot deny the way the relationship isolates her. When he makes a clumsy pass at her, she, for the first time, pulls away from him. All this time she's wondered how she could survive without him, but now she wonders if he can survive without her: if Finn doesn't have her to reveal himself to, where will that sadness lead him?
ARGH!!!!! I hate hate hate hate novels for the YA audience the imply a girl should be the emotional anchor for a boy. "he loves me I have to...fill in the blank". No. No. No. That girl needs to kick that boy in the moleskin journal I'm sure he carries around and turn out for the rugby team.
You've mentioned the father in the first paragraph. He's never mentioned again. That's a no-no in a hook.
You've described a change in her feelings but no plot, and NO sense of crisis.