Thorne had confirmed she's bisexual in August after posting photos of herself kissing another woman a week after her split from boyfriend Gregg Sulkin.
She told Maxim she's since faced backlash over her sexuality.
"I didn't even think about it. A fan on Twitter asked me [after I shared the pictures], and I'm super open about it. So I just said, 'Yeah!'" the star said.
"It is hard in this business for us. It really is," she admitted.
"I have already had people talk [expletive] to me. And it comes from people in the industry, not even fans. I've had studios tell me my image is too 'out there,' hinting at it but not really saying it."
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Thorne is presently dating "Teen Wolf" star Tyler Posey, who wished his new "love" a happy 19th birthday Sunday on Instagram.
The actress later shared Snapchat posts of herself with the 24-year-old actor.
"They are hanging out and testing the waters and seeing where it goes," a source told E! News in August.
"Bella really likes Tyler. It's new, but she hopes it will get to a more serious point. She loves being in a relationship."
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