Touching story, but why did he fall so hard for Billie?
She didn't seem to have much of a personality. Not much to offer besides the willing sex. Plus, even though he was kind and open-minded, her reputation in town was really bad and would have eventually caused problems in their relationship even if those guys had not done what they did.
I hate to psychoanalyze it, but maybe she was a female surrogate for his awkward, misfit male friend, Whitie the albino (played by future Freddie Krueger).