Matt Damon has revealed that he pines away the nights when he cant be with mates Brad Pitt and George Clooney. The actor jokes that he feels so lonely that he cries when he cant be with his 'Oceans Thirteen' co-stars. The star says he was overcome with grief on the on the set of his upcoming movie 'The Bourne Ultimatum,' the third in the Bourne series of spy films. "I would just kind of pine away for George and Brad every night," he said. "I'd sing little songs to myself looking out the window, crying." Aww chin up Damon, really Brad and George have more to cry about! Brad can't see his mates because of wifey Jolie and George's good looks are fading everyday!