Justin Bobby is quite a “player” on The Hills. Following his on-again, off-again shomance with Audrina Patridge, he started pretending to date new cast member Kristin Cavallari. But there’s something viewers don’t see: He actually has a girlfriend!

“He’s seeing a girl named Michelle Markoff,” a friend of Michelle’s reveals exclusively to Life & Style. “They’ve been dating for a few months now.” Their relationship is so top-secret, Justin hasn’t even told anyone involved with The Hills about it. “He’s desperately trying to hide his relationship from the cast as well as the producers,” says the pal. “And Michelle has been going along with it. She grew up in the same area as the Hills gang and knows them fairly well, yet she’s kept her relationship with Justin Bobby under wraps.”

But Michelle is starting to get a little tired of sneaking around. “Enough is enough,” says her friend.

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