The text say that "It's not fair"
That's code for "He's not here"

from Childish Gambino – Heartbeat Lyrics on Rap Genius

Meaning

When she does get around to answering that text she ignored earlier, it means her man’s gone. It’s not fair how he does this to her, still tormenting her, turning her on, setting her off. And what she’s about to do next isn’t fair to her new man, but she’s going to do it regardless.

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