From the album WITHERED
d4vd isn't asking a question he wants answered. He's already decided this relationship was fake and he's running the same script over and over because admitting it directly would make it permanent. The whole song is a ritual of not accepting what he already knows.
I know it was fake to you / But it was real to me
He names the central problem in six words but can't stop there. The song doesn't build from this line, it circles back to it, proving he knew the answer before he asked the question.
And if there is a world where you're not leavin' / Then darling, I need to know
He invents an alternate reality just to delay the conclusion. The 'if' here isn't hope, it's a stalling tactic. He doesn't need to know, he's buying time before he says what he's about to say anyway.
You got somebody else to take / My place, you did it the wrong way
The complaint isn't that she replaced him, it's that she didn't follow proper breakup etiquette. He's mad about procedure when the entire relationship was already declared fake four lines into the song.
Tell me, won't you tell me, won't you tell me what it is? / 'Cause it ain't love
The repeated plea directly contradicts the declarative answer. He's performing confusion he doesn't actually feel. The begging is theater, the conclusion was already written.
By the end, the repeated 'tell me' has nothing to do with wanting information. It's a chant, a way to keep talking without arriving anywhere. The song doesn't resolve because resolution would mean silence, and silence would mean it's actually over.