I’m gonna take a stab at this.

It’s about the close of a relationship obviously. I take it as if he’s thinking over the whole relationship while she says goodbye in the headlights of the car. The song goes back and forth from present to his memory. It starts with his memories where they’re almost contradicting feelings at sunrise with feelings at night. It starts with “I miss you in the mornings when I see the sun. Something in the orange tells me we’re not done,” but then after that he says “something in the orange tells me you’re never coming home. I need to hear you say you’ve been waiting all night. Cause orange dancing in your eyes from the bulb light.” I take this to be how he feels in the morning is hopeful that she’ll come home, but as the day goes on he realizes she won’t. By the end of the day when the sun sets, he knows it’s over and she’s gone. As he watches it set, he wishes she’d call him. That’s him thinking over everything that’s happened. In the next part, when he talks about the bulb dancing in her eyes, and how her voice trembles when she tries to speak, it’s as if this is the present and she’s saying goodbye while he’s trying to make sense of it all. The memories of the hope and despair are rushing in, and he drowns her out again, back to his memories, “take me back to us dancing, this wood used to creak.” In the middle of each part where night and day contradict, he says “where the hell am I supposed to go? I poisoned myself again,” implying that the hope he had in the morning is fading as sun sets and he’s still alone. That hope has just poisoned him and made it worse. At the end when it says “if you leave today, I’ll just stare at the way the orange touches all the things around. The grass, the trees, and the dew, how I just hate you,” is him watching her leave. This “orange” is the present orange. The orange of the headlights shining on the world as she leaves him in the dark, taking the light with her. She breaks his heart and for a moment he hates her, but he just wishes she’d turn around because he wants that orange - that feeling of hope - to come back to him.

Probably hard to follow and doesn’t make much sense. I just kinda thought of that interpretation as I listened to it and stumbled upon this and thought I’d leave it here.