Liam Payne’s girlfriend Kate Cassidy, who was dating the One Direction singer just days before his death, is suffering from the tragic loss.

A friend of the influencer exclusively told The Post that Cassidy was agonizing over her decision to leave Payne alone in Argentina before he fell to his death.

“She did what she had to do back then,” Cassidy’s pal said. “She had no idea what was going to happen. I can tell you that her decision will haunt her for the rest of her life.”

“She feels bad. Everyone in her life says it’s not her fault,” her friend continued.

“You can’t look after a 30-year-old adult man 24/7. But she’s not ready to hear that yet.”

Two days before Payne’s fatal fall from the third floor balcony of the CasaSur Palermo Hotel, Cassidy shared a TikTok travel vlog in which she revealed that she had left the South American country.

In the video, she said they were initially only supposed to stay in Argentina for five days, but the trip turned into a two-week getaway.

Cassidy’s friend told the Post that after she left Argentina, she tried to convince Payne to also return to Miami because she suspected he was at a dead end.

“She really tried. But he wasn’t receptive,” the pal said. “She will forever be the villain who let him down, but that didn’t happen.”

The friend said Cassidy had “planned some time away from home and wanted to extend it indefinitely.”

Despite their seemingly fun vacation, which he documented on Snapchat, “she wasn’t ready for it yet.”

The influencer, who was first linked to the musician in October 2022, was simply homesick.

“She wanted to be home in her own bed with her dog,” Cassidy’s friend continued. “She wanted to come home.”

Her friend even claimed that Cassidy felt like she was being “held hostage” before she left Argentina.

“So she tells him she wants to leave, which is a week later. He’s begging her to stay,” the pal told The Post. “She keeps extending her trip, one day, two days. And he just wants her to stay, stay, stay.”

According to the Associated Press, the “Teardrops” singer died instantly on October 16 after falling from his hotel balcony. He was 31.

Payne suffered multiple traumas, including a fractured skull that resulted in internal and external bleeding.

A partial autopsy revealed he had cocaine, crack cocaine, benzodiazepines and “pink cocaine” in his system at the time of his death, sources told ABC News on Monday.

In a tribute shared on Instagram on Wednesday, Cassidy revealed that she and the late One Direction alum planned to get married before his death.