George Clooney has been unlucky in love - one ex-girlfriend cheated on him and another left him for another guy.
He is not naming names but admits he has had his share of heartache, despite his reputation as a super-confident ladies' man.
The movie star, who was once married to actress Talia Balsam, tells The Hollywood Reporter, "(I've been) left for someone; all those things. And it was sometimes a surprise.
"The most painful was when I kept trying to get (one woman) back. But we all make dumb mistakes."
Clooney, who split from Italian beauty Elisabetta Canalis last year (11) and is currently dating former wrestler Stacy Keibler, also admits he gets lonely when romances turn sour: "I have been infinitely more alone in a bad relationship; there's nothing more isolating."