Lindsay Lohan Cocaine Bust Caused by Calum Best Split?

Lindsay Lohan was too boring post rehab and for that she was dumped by Calum Best, reports the from Britain claimed.  Now that rehab has failed, will LiLo win back her former lover Calum?  The couple's relationship seems to be at an end, after 26-year-old Best claimed the reformed Lohan was too "dull" for him to put up with.

Will Lindsay Lohan Cocaine Bust Win Back Calum Best?

A source tells Britain's the Daily Star, "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."  Did this drive LiLo back to the party circuit?

***

Right now it appears that La Lohan will again be on some sort of lockdown so it appears that calum will be on his own for a while.  Lohan is on her way back into rehab following today’s early morning DUI arrest, In Touch has learned exclusively.

She has already cancelled today’s appearance on The Tonight Show with Jay Leno where she was due to promote her new movie "I Know Who Killed Me."  Tracy St. Pierre, the show’s publicist told In Touch this morning: “Lindsay's no longer on the show. As of now, we have no replacement."

***

A member of Lindsay’s closest circle confirms that she plans to re-enter rehab just weeks after spending 45 days in a program at Malibu’s famed Promises center. It is not clear yet whether she will return to Promises or exactly when she will check in.