Credit: Jeffrey Mayer/WireImage

It's not exactly a secret that Kristen Stewart and Robert Pattinson are an item, but the two have made it a point to never discuss their relationship publicly -- until now.

During her photo shoot for British GQ's November issue, the 21-year-old said she hopes to explore more of the UK while filming Snow White and The Huntsman, "because my boyfriend is English."

When the writer asked Stewart about her accidental admission during their interview the next day, the actress got uncomfortable. "I never would have said that if I knew you were interviewing me," she said coyly.

Not that Stewart thinks she's fooling anyone by keeping her romance with Pattinson, 25, on the DL. "So much of my life is so easily Googled," she laughed. "I mean, it's like, 'Come on guys, it's so obvious!'"

Because Twilight fans are so passionate about the franchise, Stewart knew that coming clean about their relationship would be met with skepticism.

"I don't think you realize what a big deal it is for people. Well, it is a big deal. They would be 'Oh. My. God.' There would also be still a 50/50 split," the actress says. "Some people would still be, 'See, told you they're not together.'"

Just don't expect Stewart to gush about Pattinson much more in the future.

"I'm selfish. I'm like, 'That's mine!' And I like to keep whatever is mine remaining that way," she explains. "It's a funny little game to play and it's a slippery slope. I always say to myself I'm never going to give anything away because there's never any point or benefit for me."