Say Goodbye — Francine Pascal

Elizabeth Wakefield's heart is breaking; Todd Wilkins, her longtime boyfriend, is leaving Sweet Valley and moving to Vermont. Todd and she have only one week left. After that the only boy Elizabeth has ever loved will be gone - forever. Jessica, Elizabeth's scheming twin, is ecstatic; she never liked Todd anyway. The moment Todd leaves, Jessica begins to hunt for a new boyfriend for Elizabeth. But when Jessica's plot backfires, it threatens to destroy Elizabeth and Todd's enduring love!