Jennifer Lopez has become a “fitness robot” who is obsessed with her body, and it caused problems in her relationship with boyfriend Casper Smart, Breaking Celebrity News has exclusively learned.

Lopez, 44, recently broke up with Smart, 26, in the wake of embarrassing allegations that he had “sexted” transgender model Sofie Vissa.

But now a source is telling Breaking Celebrity News that Lopez’s body issues also played a role in the two drifting apart.

“Jennifer’s obsession with her own body is out of control,” the source said. “There’s no doubt she’s worked herself into the ground to achieve her killer shape.”

Although Lopez is hailed as an incredibly fit forty-something, the source revealed her focus on fitness has affected those around her, especially Smart.

“In the end, Jen and Casper had nothing else to talk about except diet and exercise stuff, and that was exactly how she wanted it,” the source said.

Lopez’s trainer, Tracy Anderson, recently told Allure Magazine that the single mom of twins follows a portion-controlled diet and participates in rigorous 90-minute workouts.

The singer and American Idol judge told British Glamour Magazine herself earlier this year, “I’ve worked out my whole life and I’ve been incredibly disciplined when I needed to be.”

Although Lopez said she sometimes wants to relax in a beach chair, she motivates herself to do otherwise.