5th Avenue by America is a melancholic reflection on lost love and longing. The song captures the feeling of walking down a bustling city street, specifically 5th Avenue in New York City, while reminiscing about a past relationship. Themes of loneliness, nostalgia, and the passage of time are vividly illustrated through the poignant lyrics. The line 'I see your face in every window' emphasizes the haunting memories that linger everywhere the protagonist goes. The combination of vivid imagery and emotional depth makes this song a touching exploration of heartache and the search for closure.