He loves her … he loves her not — TMZ has learned, Justin Bieber and Selena Gomezhave broken up multiple times in the last few months.

Sources in a position to know tell us, Biebs and Selena most recently ended things last week — but have since decided to give their relationship another try … kinda.

We’re told Justin and Selena’s current situation is tenuous … they’re not “solid” … they’re just figuring things out.

They’ve been dating for roughly a an and a half.

Teenagers.