Actor Joseph Gordon-Levitt has warned his girlfriend he is not the marrying kind after confessing he prefers "not to be too committed to any one future". The Dark Knight Rises star has opened up about his dating life and future plans during a candid radio interview with U.S. shock jock Howard Stern, revealing he has been quietly dating a woman who is "not in showbusiness". However, Gordon-Levitt admits that while he would be open to starting a family with his mystery partner, he is hesitant to settle down with her and make her his wife. He says, "I think I'm a pretty good person and a good boyfriend... I think that I could partner up with somebody - I don't know who that somebody is - I could partner up with a woman and commit to, 'We're going to raise a family and that's a project we're going to commit to for 20-something years.' "(But) I like to not be too committed to any one future that's really far away, necessarily, unless there's a reason, which is why I'm saying if you're gonna raise a family... I can make that commitment."