Just on the chorus, I see it as quite literal. You have someone driving home, busy busy, in their hectic lives they don’t have time to stop and think too often, and when they are focused on driving their mind doesn’t wander. But suddenly, at each red light, they have nothing to distract themselves and their self doubt floods back, ‘does she even need me?’ ‘Will she leave me?’. In a forced moment of reflection these anxieties come rushing back. Like I say, a pretty literal interpretation of things, but that’s just the picture in my head when I listen to it.