Justin Bobby and Audrina Partridge Split!

After countless heart-to-hearts with concerned friends (on and off camera), Audrina Partridge has finally told her motorcycle-riding boyfriend Justin “Bobby” Brescia to hit the road. The Hills star tells Us Weekly in its new issue that it took an embarassing public blowout at a nightclub for her to realize he was not Mr. Right.

“I caught him doing something he shouldn’t have been doing and it was just the last straw,” Patridge, 22, tells Us of her October 16 fight with Brescia outside of L.A. nightclub Opera. What was Justin-Bobby up to? A Hills source says he was “making out with a red-headed girl right in front of Audrina, and when she confronted him about it he laughed in her face.”

Patridge said, “It was one of the hardest nights ever I’ve had to deal with. And it was on camera too.” Patridge admits that she and Brescia, 25, whom she met before she was on The Hills, never were dating exclusively. But Patridge says he had been recently testing his limits. “I don’t feel like he’s giving it all.” “I’m always there for him no matter what, and sometimes I don’t feel like it’s mutual.”

A Hills source is more blunt: “Whenever they’d go out, he’d ignore her. He would never return her calls, never ask her on dates.” Don’t feel bad for Patridge though. She’s already found a new guy, Aussie BMX racer Corey Bohan, who a source calls “the total opposite of Justin.”