Hayden Panettiere’s ex Brian Hickerson shared a horrifying story from their troubled relationship, admitting he was abusive towards her. Panettiere and Hickerson dated on and off from 2018 to 2022, though the relationship was tumultuous and marred by multiple domestic violence incidents and arrests. Hickerson spoke to TMZ about Panettiere’s upcoming memoir,  “This Is Me: A Reckoning,” in which she writes about the domestic abuse in their relationship. Hayden Panettiere’s ex Brian Hickerson said he read her upcoming memoir, “This Is Me: A Reckoning,” in which she writes about their abusive relationship. They’re seen here in December 2018. Eric Charbonneau / Shutterstock Hickerson said there was an incident he didn’t want her to write about, but she included it. They’re pictured here together in January 2019. GC Images Hickerson said there was one particular incident he didn’t want in her book, but she included it anyway. “There’s a story where I was drunk, right?…