"The Dark Knight Rises" star Joseph Gordon-Levitt warns his fans against falling in love with an "idea of the person".

"A lot of boys and girls think their lives will have meaning if they find a partner who wants nothing else in life but them," Levitt told Playboy magazine in an interview.

"That’s not healthy. That’s falling in love with the idea of a person, not the actual person."

Levitt, who shot to fame with the hit "(500) Days of Summers," wants fans of the movie to again watch Marc Webber's film and re-think his character in the movie.

"I would encourage anyone who has a crush on my character to watch it again and examine how selfish he is. He develops a mildly delusional obsession over a girl onto whom he projects all these fantasies. He thinks she’ll give his life meaning because he doesn’t care about much else going on in his life."

In the film, Gordon-Levitt plays an architecture major, who draws greeting cards for a living. He falls hopelessly in love with the new girl at the office named Summer mistaking her for the "one true love". The couple appears to be having a really good time, until one day, Summer dumps Gordon-Levitt's character. The film recalls his 500 days with her.

It's not that Gordon-Levitt had anything against the film that boosted his mainstream popularity along with her screen partner, Zooey Deschanel (who is now the lead star of the hit television series, "New Girl"). He says he really like the film, and it subtlety.

"But a part of the movie that’s less talked about is that once Zooey’s character dumps the guy, he builds himself up without the crutch of a fantasy relationship, and he meets a new girl," Gordo-Levitt tells Playboy.