"Exposed to sex at such a young age it's all I know how to offer to the world," she wrote.
Bella Thorne is opening up on Instagram.
Along with a series of topless photos, the actress posted a lengthy caption in which she revealed she had been molested her entire life.
"What is wrong with me? Why do I always need Validation from everyone but mostly men..." she began.
"Everyone keeps telling me to be single, be alone, and make your self happy. But All those things sound so f--king scary to me. all I want is him. I want him to hold me, I want him to love me, I want him to tell me it's ok, I want him to look me in the eyes and let me know I'm accepted.
"Why? Because I can't accept myself. For some reason in my head I'm just not f--king good enough. Not good enough for him or Her or anyone else. And if it's not him I just look for the 'next' him, or her Why can't I just look for the next me? Find me and accept me."
She continued: "Was it because I was molested my whole life. Exposed to sex at such a young age it's all I know how to offer to the world...or is it because I was raised to think I wasn't good enough. Not good enough for her or anything else."
Bella recently went through very public break-ups with Mod Sun and Tana Mongeau, with whom she was simultaneously in relationships at one stage. Tana has since "married" YouTube star Jake Paul.
The "Assassination Nation" star admitted she can't blame her childhood for what is happening to her, or anything else. "All I can do is blame me," she wrote. "I blame me for not loving myself. I blame me for not thinking I'm attractive, I blame me for putting this on everyone around me. Expecting people to love me enough for me to love myself."
"You have to hurt in this world. Hurting, loving, and accepting. That's what our emotional world lays on. Right now I only have one of those things. Can you guess what it is? Hurting. Right now I only hurt...but I'm not hurting for other people no I'm only hurting myself. By not loving me and by not accepting me."
She concluded by declaring the "poem" was about "mommy and daddy and me and you."
Bella's father Delancey died in a traffic accident in 2007, when she was just nine years old.
Got a story or a tip for us? Email TooFab editors at email@example.com.