Cassie was pushing through with Diddy during their tough years together … partying it up and getting all lovey-dovey on stage in Dubai — before they officially called it quits.
TMZ has obtained this clip of Cassie cozying up to Diddy during his first-ever Dubai performance in April 2018 … and you can see the two were all smiles as the rapper performed “I Need a Girl (Part 2)” at the opening night of the now-closed Gotha Nightclub.

On the surface, the pair looked happy, with Cassie glowing as she busted out some moves and vibed with Diddy. She got up close to share a hug with him before making her way to the edge of the stage.

TMZ.com

You can also spot his sons, Christian and Justin, joining the fun in the video … we’re told Diddy even invited Christian onstage so he could belt out his new track at the time, “Love You Better,” which he put out with Chris Brown.

A few months later, in October, Cassie’s rep confirmed she and Diddy had broken up — and had been for months. So, it seems their split happened not long after this serenade.

Of course, now we know their relationship had been tumultuous — something made painfully clear by the 2016 hotel surveillance footage of the disgraced rapper beating her, which surfaced this year.

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While Cassie now enjoys her freedom from the relationship, Diddy’s facing a much darker reality — sitting behind bars with a slew of allegations hanging over him as he awaits his next court date on October 9.

We reached out to Cassie’s attorney, Douglas Wigdor, and Diddy’s reps … so far no word back.