When a relationship's over, says Helmlinger (and everybody else who has ever tried one), you don't feel too good. You feel guilty, mean, anti-social, hopeless, depressed, fat, and unlovable. What you need is reassurance, and here's a sweet-talking tea cozy of a book that will provide same. . . if you don't mind filling out self-help questionnaires ad nauseam (list the parts of you that have nothing to do with being a pair); listening to too many case histories (Geri ended up finding a reason to live); and putting up with chapter headings like ""Getting the Most out of Inspirational Literature.