Justin Bieber has told girlfriend Sofia Richie there’s no chance of an exclusive relationship, because monogamy is not the Biebs’ style!

An insider told OKMagazine.com exclusively that the 22-year-old told 18-year-old Sofia that he likes to date multiple women at once and if she’s down with it, she can remain in his roster.

However, two can’t play this game because Justin doesn’t allow his women to see other guys besides him!

“This is classic Justin, he’s free to hook up with other girls,” said the source, “but if Sofia so much as looked at another guy he’d go ballistic.”

While the source said Richie is happy with the non-exclusive arrangement, her pals are worried she’s giving into Bieber’s demands way too much, though they claim she’s only with him to boost her music career.

She’s totally under his spell and thinks he walks on water. Whatever Justin wants from her, he gets,” said the source. “If he says jump she says how high, nothing is up for debate with him and never has been – it’s his way or the highway.”

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