My boyfriend is besties with my fake friend

Recently me (19F) and my boyfriend (19M) (we've been together for almost 3 years) stated college, we live separately and go to different schools.

He never has time for me but has time to hang out with his buddies and my ex friend (19F) that goes to his college, she's been gossiping about me in our hometown and did some awful things yet and stopped taking to me even thought I didn't do anything to her.

He insist that he says as besties with her, everyone's telling me to confront her about everything, should I do it? Or should I break up with my boyfriend?

Some additional info: I'm the one who introduced them

TLDR: my boyfriend is besties with my fake ex friend and idk whether to confront her or not