This Hell Called Love — Jane Donnelly

Terry Reed's schoolgirl crush on Dane Veness has grown into a passion. But Dane's passion had been solely for his work, his medical research on tropical diseases -- until beautiful but destructive Elizabeth came into his life. Still, Terry hung on, a stubborn streak of pride keeping her love for him well hidden. Then came the day when she had to muster all her strength and courage to save Dane from the terrible addiction to which Elizabeth had driven him!