Interesting book: The Biology of Desire: Why Addiction Is Not a Disease by Mark Lewis
Of course, it depends on how you want to define "disease" Is a "personality disorder" a disease?
What about overweight and obesity? There has been a big debate about that, but the pressure to term overweight a disease rather than, say, a physical condition, is all about insurance coverage. Otherwise, such questions would matter little.
Speaking of desire, what about those magnetic attractions to one of those of the opposite (or, I suppose, same) sex? Those can be as powerful as drugs and make people behave just as crazy.