Al Pacino reportedly regrets not marrying Diane Keaton after their on-again, off-again relationship that spanned nearly two decades. Keaton — who died Saturday in California at age 79 — played Pacino’s girlfriend in “The Godfather” trilogy, and they started dating in 1974. They called it quits in 1990, after Keaton gave him an ultimatum and he refused to commit to marriage. Pacino, 85, now wishes he had tied the knot with the late actress, a source told the Daily Mail in an article published Sunday. Al Pacino regrets never marrying Diane Keaton after the two dated on and off for nearly 20 years, a friend of the actor told the Daily Mail. London Entertainment Pacino and Keaton dated from 1974 to 1990. Ron Galella Collection via Getty Images “I know he will forever regret he didn’t make his move when he had the chance,” a friend of the legendary actor told the outlet. “For years after he and Diane split, Al used to say, ‘If it’s meant to be, it’s never too late for a do-over.’ But sadly, now it is.” “Looking back, Al admits the love of his life was Diane, who he’s always called, ‘an amazing woman,’” the
