Too Close for Comfort — Debra Spector

For years Drea and Derek have been best friends. They've always loved each other, but when Derek asks Drea for a date, their feelings grow stronger, until finally they're in love. Then things start going sour for Drea. Is it because Derek's becoming so possessive? Or because Sam Hennessy's getting interested in her? Should Drea break up with Derek? And if they do, can they ever be friends again?