Jojo's ex says she was going behind Ben's back on the US Bachelor.

Remember when Joelle ‘Jojo’ Fletcher declared her undying love for swoon-worthy US Bachelor Ben? Well, her ex partner has come forward claiming that it was all a lie.

Jojo and Chad Rookstool had been together for two years, splitting up just three months prior to the 25-year-old beauty moving into the Bachelor mansion. From there Chad and the rest of the world watched her fall head-over-heels for her on-screen beau, with whom she exchanged mutual declarations of love.

But… talking to In Touch Weekly, Rockstool has alleged that he and Jojo resumed dating shorty after she was dumped during the finale of the juggernaut matchmaking show.

“When she got home, she kept telling me she loved me and that we should have stayed together and fought through our issues,” he alleged. “She said we would’ve been married by now, and I agreed with her.”

Jojo declared her love for Bachelor Ben on air. via ABC.

Understandably though, hairdresser Chad couldn’t stand the thought that she might still be in love with Higgins. “JoJo told me, ‘Chad, come on, you know it was TV’,” he said. “I think she just got sucked up in the show rather than actually trying to have legit feelings.”

The pair thus rekindled their romance, albeit in secret, until just four months later when Jojo announced she would be leaving him so that she could accept the invitation to be the next Bachelorette. “She tried to tell me she wasn’t saying goodbye forever — but I told her that I’m not going to sit around and wait for her [this time], and that was it.”

Watch Bachelor Ben Higgins toss up who to chose for his final rose…

Video by ABC