Everything about Gale's life isn't quite what he wants it to be. He lives in a small town where nothing happens. The popular kids pick on him for always wearing dark clothes. And then there's his teacher, Mrs. Tyler.
To Gale, Mrs. Tyler embodies everything he could ever want a woman to be. She's beautiful, she's intelligent, and she actually talks to Gale (unlike the girls his age at his school).
Gale is just biding his time. Waiting for the right moment to say or do something that will really get Mrs. Tyler's attention. Sure, she's married to that jerk Officer Parry, but that's just another obstacle he'll have to overcome.