If they are looking out for you, thy probably see what you can’t—a boyfriend who is probably cheating on yu with “All That Jazz.” Confront him but I doubt he will admit it sand call your friends liars, this lover…..
The fact that you’re “on a break” with him points to things already being rocky and unstable between you two. Now on top of that, he’s cheating. Yeah…time to put this “relationship” out of its misery.