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.
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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."
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