Kristen Stewart Admits She's 'Miserable' as Rob Pattinson Moves On?

Kristen Stewart's personal life appears to be taking a heavy toll on her emotional well being as the actress recently revealed that she is miserable in real life.

The 22-year-old "Twilight" star's life was instantly turned upside down in July when she was forced to come clean about cheating on Robert Pattinson, her boyfriend of three years, with her "Snow White and The Huntsman" director Rupert Sanders. During a recent interview, Stewart was asked what makes her happy, and she admitted that finding happiness in the midst of all the drama is a personal struggle.

"I'm a miserable ----! I'm not sure if I'm most happy when I'm comfortable and content or when I'm pushing myself to the limits," Stewart told the November issue of Marie Claire magazine U.K. "There are such different versions of happy. And I really appreciate both."

The news follows recent reports that Pattinson, 26, may have already moved on from his "Breaking Dawn" co-star after he was photographed enjoying a night out with an unidentified woman.

"He had his arm slung around her at one point and they chatted for most of the night. They looked like they were having a great time and the girl was making him laugh a lot," one onlooker reportedly told

"There was about five of them but it looked like Robert only had eyes for the girl. They sat really close to each other on the couch. He looked really happy and relaxed, like he didn't have a care in the world," the source went on

In July, photographs of Stewart's tryst with Sanders, who is a married father of two, were published by Us magazine and despite the scandal, she was reportedly determined to salvage her relationship with Pattinson. Some critics suspect that Pattinson's reported reluctance to give Stewart a second chance is the reason that she is beating herself up and feeling so unhappy.

"[Kristen's] dying to save the relationship. It's the only thing she cares about," a source reportedly told Us magazine. "She can't believe she ------ all this up and ruined everything."