Chris Brown has been dating Karrueche Tran amid persistent cheating suspicions of the "BET 106 And Park" host, who allegedly still doesn't trust the "X" singer.

According to a report from Hollywood Life, a recent Instagram post by the petite model hinted that the on-again-off-again couple may once again be experiencing relationship problems. The gist of Karrueche Tran's post read: "I will no longer waste my precious time trying to fix me to fit you."

Karrueche Tran's Instagram message continued: "I will no longer sulk myself in sadness when people want to leave because I came to a conclusion that you have to lose the losers in order to find your winners."

An insider has revealed to Hollywood Life that while Chris Brown is still dating Karrueche Tran, people can't really blame his girlfriend of five years for being defensive. "The situation is over now, but you really can't blame Karrueche for being on high alert with Chris when it involves another girl," the source said.

The insider explained: "She's been in that mess with him many times before and she'll be damned if he tries to pull another stunt on her again. She's not going for it."

According to Hollywood Life, Chris Brown is dating Karrueche Tran amid rumors linking him to a female friend named Jhene Aiko. The insider narrated that Karrueche Tran "understands they're friends and all and she's just trying protect her heart."

"She's human, she's a woman and she knows who women are especially when it comes to Chris Brown. Everywhere she's ever gone with Chris, she sees how other girls are on the prowl like a hungry cat. They don't even say anything but she can see it in a girl's eyes," the source narrated.

"So, you really can't blame her for being overly protective of herself and Chris," the insider said.