She may play a reformed wild girl on Gossip Girl – but Blake Lively says her romantic life isn't nearly as scandalous as Serena van der Woodsen's.

"There wasn't a period in my life like Serena went through, where I was doing drugs and having sex with my best friend's boyfriend," Lively, 20, tells Cosmopolitan. "I never went through that kind of crazy."

The actress is steadily dating Gossip Girl co-star Penn Badgley - and pre-Penn, Blake had only locked lips with two other guys.

"I've kissed just three people in my life, other than stuff that I've done for TV or movies," she says. "I know, I'm weird! I hope Brad Pitt doesn't read this... He's never going to want to marry me now!"

While her character attends a high-society New York prep school and leads a champagne-fueled life, Blake Lively tells the magazine her high school experience (in Burbank, Calif.) was far more laid back.

"I was class president, on the cheerleading squad, in a competitive show choir, and in, like, six different clubs," she says.

One of her crowning achievements? Sported a bulldog costume to act as her school's mascot during some football games. That up-for-anything attitude is what helped her break into acting, she says.

All in all, she's a very grounded girl - one who (fortunately) we shouldn't expect to see in the police blotter anytime soon.

"I don't drink. I don't do drugs," the actress says, then deadpans with laughter, "But you know, I do sleep around a lot."

Another surprising Blake Lively fact?

“On average, I order about three meals for myself in one sitting,” she says, and isn't kidding - two bread baskets, two appetizers, two pasta entrées, and three desserts later, she decides that’s enough food ... to start!

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.