The line is about the agony of being with someone you're losing.
It’s the moment you realize staying is harder than leaving. The dark used to be scary – fear of being alone, fear of what you can’t see. But now the morning is worse, because morning means another whole day of trying to love someone you can’t reach anymore.
Julia Michaels wrote a breakup song from inside the relationship, not after it. The narrator isn’t afraid of the night anymore – she’s afraid of waking up next to him and pretending everything’s fine. That’s the killer: the relationship is still technically there, but the connection is gone. Every sunrise is another day of failing at something that used to feel natural.
That line hits because it’s honest about how heartbreak works. Sometimes the scariest part isn’t the unknown – it’s the known, right in front of you, with no easy way out.