Mischa Barton at the Teen Vogue, young Hollywood issue release party, at the Sunset Tower Hotel, West Hollywood, California. (09/20/2006). Photo Credit: Russell Einhorn / Splash News

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Washington, Dec 8 (ANI): Mischa Barton is a very unhappy person these days, for it seems that after her character on the hit TV show ‘The OC’ was killed off at the end of last season, she has been dealing with a spot of depression.

A source revealed that the actress felt as if her career had been spiraling downhill ever since she decided to walk away from the show.

"Mischa is miserable since she left 'the O.C.' She feels like her life is over and everything is going downhill...She acts like she has nothing to live for," the Bosh quoted the source, as saying.

The source also said that her bad mood was souring her relationship with musician Cisco Adler. Barton has reportedly pestered her boyfriend for a commitment, and threatened to walk out of the relationship if he did not give her a ring.

However, the only ring that Adler presented her with was a promise ring, as he was not ready to get engaged.

“Later she became hyperemotional and started acting crazy again, when Adler asked for some time off she threatened to kill herself and their dog. These threats made him to pretend to work out things and would not let her down. He's hoping she'll come to her senses and won't do anything violent or vindictive. But he wants out," the source said.

The couple has been plagued by rumors of a split, especially as they have not been photographed together for a long time now. (ANI)