She concluded her letter by speaking directly to Payne, her boyfriend of two years.
“Liam, my angel. You are everything,” she wrote. “I want you to know that I loved you unconditionally and completely. I will continue to love you for the rest of my life. “I love you, Liam.”
Payne was found dead Wednesday after falling from the third-floor balcony of a hotel in the Palermo district of Buenos Aires, Argentina.
The circumstances of the pop star’s death remain under investigation, but a preliminary autopsy on Thursday revealed he died from multiple trauma and internal and external bleeding.
Cassidy, a New Jersey native, recently traveled to Argentina with Payne. On October 2, the pair were spotted at the Movistar Arena in Buenos Aires, where Payne’s former One Direction bandmate Niall Horan was performing.