Samantha Ronson: Not Even Friends with Lindsay Lohan

Despite her best stalking efforts, Lindsay Lohan's turbulent relationship with Samantha Ronson has now hit the final dead end, according to sources.

As she again makes headlines for dubious reasons – this time over a Scotland Yard investigation into a $400,000 jewel heist - LiLo and SamRo are dunzo.

The two never officially got back together after their recent split, inside sources say. Now, after Lohan's latest "manic" antics, they aren't even friends.

"[Sam] let Lindsay back into her life as a friend, but now even a friendship seems impossible," says a source close to Samantha Ronson.

"No matter how many times she promises to change her behavior, Lindsay loses control and starts acting like a maniac."

Where would she ever get that crazy idea?

Amazingly, Sam does not want to take this back.

The recent antics included the Lindsay Lohan topless pic she posted on her Twitter and her long hours of partying in Los Angeles and New York.

"She is telling everyone that Sam dumped her again, but it makes no sense since they never got back together," according to the Sam source.

While the couple had been repeatedly photographed together, sources sany any reunion was strictly based on friendship, not romance: "Sam is a nice person and wouldn't throw anyone out of her life, but it was no more than that."

Guess the reports that she had successfully stalked and retained her girl-on-girl action partner were premature, or based on pure conjecture.

Oh well. Click to enlarge some Lindsay and Samantha Ronson images below, showing the strange couple's most touching moments together...