Mischa Barton, sad over her waning career and slovenly unwashed paramour, cries and cries and demands an engagement ring and threatens to kill herself and take her poor dog with her. We're not sure what's more disturbing: Puppy murder or thinking Cisco Adler makes an ideal life mate.

Website Janet Charlton's Hollywood reports:

"Mischa is miserable since she left The O.C. She feels like her life is over and everything is going downhill." revealed an insider. "She feels lost since she left the show and started pestering her boyfriend Cisco Adler for a commitment. She threatened to leave if he didn't give her a ring. He wasn't ready to get engaged so he stalled by buying her a "promise" ring. That satisfied her for a few weeks, but she started acting crazy and hyper-emotional. "She acts like she has nothing to live for." Cisco couldn't take the drama and told her "We're better off apart." He told friends "She's too crazy for me." That really set her off - she threatened to commit suicide and even threatened to kill their dog! She was seen sobbing in her car with wrist bandages. Whether she actually cut herself isn't known. "Cisco feels bad so he's pretending to work things out with her so he can let her down easy. He's hoping she'll come to her senses and won't do anything violent or vindictive. But he wants out."

We think we've found Mischa's motivation here. She's in mourning over the death of Marissa Cooper to such a point that she now believes that she is Marissa Cooper. In the coming months we will witness Mischa ODing in Tijuana, throwing lawn furniture into pools, and having a totally-not-convincing lesbian affair. But, Mischa, we've seen Cisco Adler. And he's no Ryan Atwood. Save the suicide threats for a boy who's intimately acquainted with a bar of soap.

Oh, see Mischa's best parts at MrSkin.com.