In Touch has learned that The Bachelor contestant Lauren Bushnell — one of the final two women vying for Ben Higgins‘ heart — hasn’t been completely honest with the Bachelor.

“Lauren isn’t the girl Ben thinks she is,” a source reveals of the soft-spoken flight attendant. “She’s really been playing up the wholesome girl-next-door thing on the show, but Lauren has things in her past that she’s not proud of, and she’s keeping it from Ben.”

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An insider close to her ex, Sean Evans, says that “she loves to drink,” and has a hard-partying past.

“When Lauren was with Sean, she would lay by the pool every day taking shots and downing mixed drinks. Then she’d continue to drink all night.”

Lauren and Sean split in April 2015 – just five months before she left to film The Bachelor — after more than three years together.

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The blonde beauty proved that her partying was out of control in April 2015, when she was arrested for public intoxication at the Stagecoach Country Music Festival in Indio, Calif.

“It was embarrassing to be around her when she was drunk because she’d turn into a mess,” adds the insider. “She’d have these drunken crying fits in public places — she’s way too emotional.”

And clingy. Lauren is “super needy” according to the insider, stating, “If Sean tried to go out with his friends, she would call and text him nonstop until he got back home.”

“[Ben will] be devastated when he finds out who the real Lauren is. His biggest fear in this whole process is to have someone break his trust,” says the source, adding that Lauren should have been upfront about her past from the beginning.

For more on The Bachelor, pick up the latest In Touch, on newsstands now!