"I want to say I can always trust my good friends that I've had forever, but some of my oldest friends have betrayed me." - Lauren Conrad

In an exclusive interview with Us Weekly, LC talks about how her ex Brody Jenner went public with a new girlfriend days after she left for Paris.

To make matters worse, best friend Audrina Patridge allegedly buried the hatchet with Conrad's ex-BFF and current rival, Heidi Montag.

"At this point, I have to question everyone that wants a relationship with me, whether it's friendship or a romantic relationship," Lauren said.

"Audrina has to remind me that she's not someone who's going to betray me," the 22-year-old star of The Hills says pointedly.

The Hills' Lauren Conrad was not pleased by a revelation that Brody Jenner has a new girlfriend ... or that Audrina Patridge had a new (old) pal in Heidi Montag.

As for Brody Jenner's rebound, she says, "When you have that type of thing, you always have to question, 'Why wasn't I good enough?'"

"It's disappointing to have to question relationships," she adds.

And to think, she's not even feuding with Spencer Pratt in this article! All this and more will come flooding back to us as The Hills returns on Monday, March 24.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.