The Mean Girls star shocked fans when she struck up the same-sex romance in 2008, and they quickly became one of the most talked about couples in Hollywood.
However, the relationship was filled with drama and the pair hit headlines with a number of arguments on the Los Angeles club scene.
Now Lohan admits she wasn't mature enough to be in love, telling Us Weekly magazine, ""I need to love myself first before I could be with anyone else, and I was going through a lot. Two toxic people cannot be together. End of story.""
The 26-year-old star is now on good terms with her ex-girlfriend, but admits she was seriously heartbroken after they parted ways.
She adds, ""We're friends now. That's how it started so I think that's how it was meant to be... I was bold enough to say, 'Yeah, I like a girl. And?' That put her in a situation where she was being attacked every day. That's not fair. And what am I left with? Heartbreak. That was three years ago. It was my last serious relationship.""