The four-month or so love affair between "Hills" star Audrina Patridge and Ashlee Simpson's ex-boyfriend Ryan Cabrera is over.
![](https://images.toofab.com/image/b7/o/2010/05/19/b74782e8b9ac521da586863bc7ac1b3c_md.jpg)
According to Us Weekly, Audrina dumped Ryan shortly after they celebrated her 25th birthday on May 9th at Las Palmas in Hollywood because he's a "constant partier." (See the b-day bash pics!)
Where's Justin Bobby when you need him?