Erich Segal (b. 1937), U.S. author. Love Story (film) (1970).
The words (spoken by Ali McGraw) were used to promote the movie; in Segal's novelization of the film (he also wrote the screenplay), the words appear as "Love means not ever having to say you're sorry." (ch. 13). Many variations have been coined over the years, for example, "Vasectomy means not ever having to say you're sorry." (Attributed to Larry Adler).