Article continues below advertisementJennifer Lopez is said to be alone again after ending a brief off-screen romance with Brett Goldstein, with sources telling OK! the singer and actor ultimately failed to meet her exacting standards following her split from Ben Affleck.Lopez, 56, and Goldstein, 46, are said to have grown close while filming the upcoming romantic comedy Office Romance, where their on-screen chemistry is said to have translated into a short-lived real-life connection.