"I am by no means mentally unstable," she says. "Well I am pretty crazy and weird sometimes, but not mentally unstable."
The 24-year-old actress, who has been dating British DJ Ali Love for the better part of a year and has a few film projects in the hopper for 2010 and 2011 release, tells OK! that staying positive is what keeps her going.
"I balance [depression] with positive things in my life and that's why I have my outlets of music and literature," says Barton. "As much as I get down, I'm an upbeat person. People always think of me as kind of a light in a room. I love to make people laugh."