Bella Thorne Hints at Bad Blood With a Mystery Mean Girl: 'I Stay Away From Her at All Costs'

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Bella Thorne has her very own "mean girl," and a famous one at that.

Bella Thorne isn't friends with everyone in Hollywood.

In a new interview with Seventeen magazine, the 18-year-old Disney star admits to having a "mean girl" in her life, who's also in the business.

"I stay away from her at all costs," Thorne says, obviously declining to name names. "I never say hello to her. Her siblings are not mean like she is. It's just her. One of the reasons I don't like her is because she's been a billionaire since she was very little, and she's never had to work for anything in her life."

WATCH: Bella Thorne's Message to Girls -- 'Demand More' from Your Men

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The same can definitely not be said about the former Shake It Up star, who lost her father to a motorcycle accident when she was nine years old. Without his income, Thorne reveals she and her mother and her three siblings lived off of food stamps.

"I don't think anybody really knew -- it wasn't a very obvious thing," she says about their financial struggles. "I've never really talked about it. I wasn't hiding it, and it wasn't like, 'Oh, I'm embarrassed because we don't have money.' It was, 'Oh, we don't have money, so we're going to work that much harder.' It was scary, though, because you really want those jobs. It's a different hunger when you want your family to eat."

Thorne admits her father's death has also led to a fear of driving.

"I’m not mature enough to accept the responsibility of perhaps taking someone else’s life," she candidly explains.

But the actress is happy to ask her mother for rides, and perhaps her boyfriend too. Thorne is currently dating fellow former Disney star Gregg Sulkin, 23, and says their relationship is much healthier than a previous one she was in.

"An ex of mine and I knew each other's phone passwords, and he was constantly going through my phone," she shares. "I learned not to do that because anything can be misread. Gregg has my password, but he doesn't go through my phone. The ex and I also had a 'Don't talk to the opposite sex' rule, so if a guy I was working with wrote me, it would be a big problem."

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WATCH: Bella Thorne on Turning 18 and Being Too Scared to Drive -- 'I Still Don't Have a Permit'

So, is it safe to say Sulkin wasn't jealous of her love scenes with Patrick Schwarzenegger for their upcoming film, Midnight Sun? ET caught up with the actress in August, when she dished about how she got comfortable with her handsome costar before shooting some of their more intimate scenes.

"It was the weirdest thing I've ever experienced in my life," Thorne said. "We're running these scenes and all of a sudden he puts his hand on my leg and I'm like, 'Your arms around me. I really didn't see this for us, but OK. I'm going with it. This is cool.'"

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