Lindsay Lohan's dull when she's sober, says Calum Best

Troubled actress Lindsay Lohan has been ditched by her boyfriend Calum Best because he says she is “too boring” when she is sober.

Lohan, who went to Promises rehab center after she was arrested on suspicion of DUI following a car crash. Lohan completed 45 days in rehab and was released with an alcohol monitoring bracelet around her ankle. The “Mean Girls” actress recently said that her family, and her relationship with Best, helps keep her out of trouble. She also said she was looking to a "calm" life with Best.

Now Calum says the post rehab Lindsay is too “dull” for him to deal with. “Calum called Lindsay on Friday and said that he was finding her post rehab existence dull and that he didn’t want to give up partying. Calum loves Lindsay, but he’s simply not in the same place as her anymore,” a source revealed.

Lindsay's currently working on a new movie “Dare to Love Me” and is taking Tango classes in preparation. It is unclear what role she will play in the movie.