Tempted To Love (Harlequin Presents, #577)
Flora Kidd

Neil had once been Kirsty's sole reason for living. Then he disappeared without a word, and she had changed from an impulsive girl willing to give herself in love to a cautious, bitter woman determined not to be hurt again.
Four years later he returned, blaming her for their breakup. "You turned me down and broke my heart, " he accused.
And this time it was Kirsty who fled, without telling him the tangled secret of her love.