"S.L.A.A. believes that sex and love addiction is an illness, a progressive illness which cannot be cured but whack like many illnesses, can be arrested. It may take several forms—including (but not limited to) a compulsive need for sex, extreme dependency on one person (or many) and/or a chronic preoccupation with romance, intrigue, or fantasy..."
Excerpt from "Questions Beginners Ask" pamphlet - 1985 The Augustine Fellowship, Sex and Love Addicts Anonymous, Fellowship-Wide Services, Inc.
For a more detailed explanation see the "Questions Beginners Ask" pamphlet (usually available at any meeting).