Ryan Gosling says he is single because he hasn't met anyone to ''top'' former lovers Sandra Bullock and Rachel McAdams, who he describes as being ''two of the greatest'' girlfriends ever.
The 'Drive' actor - who dated Sandra for a year until 2003 and saw his two-year romance with Rachel end in 2007 - is currently too focused on his career to date and says he hasn't found anyone who could "top" the romance he had with his former flames.
He said: "There's interest but I'm in a committed relationship with film. I'm giving as much to it as a marriage.
"I had two of the greatest girlfriends of all time. I haven't met anybody who could top them."
Ryan believes both relationships ended because both he and his girlfriends work in Hollywood.
He explained in an interview with The Times newspaper: "Showbusiness is the bad guy. When both people are in showbusiness it's too much showbusiness. It takes all of the light, so nothing else can grow."
The 30-year-old star also admitted he would love to have children and will happily give up his movie career when the time comes to start a family.
He said: "I'd like to be making babies but I'm not, so I'm making movies. When someone comes along I don't think I'll be able to do both and I'm fine with that. I'll make movies until I make babies. I have no idea when the handover will happen."