The city doesn't care how you feel. Buildings stay the same whether you're in love or heartbroken, happy or grieving. The speaker finds peace in this indifference, learning to love reality for refusing to bend to emotion.
But the external world did not follow my inner moods. Buildings that had provided the backdrop to my love story, and that I had animated with feelings derived from it, now stubbornly refused to change their appearance so as to reflect my inner state. This refusal of change was a reminder that the world was an entity that would spin on regardless of whether I was in love or out of it, happy or unhappy, alive or dead. It could not be expected to change its expressions according to my moods, nor would the great blocks of stones that formed the streets of the city take time to consider my love story. I love that.
