Answer:
After listening to the lyrics, it sounds as if the song is about a friendship/relationship that didn't go as planned, and they weren't as close or in love as they thought they were. Perhaps the song was made to tell a story about the two, or to teach a lesson, such as how some things don't always go the way we we expect. Based on the song, you could try performing with a sense of storytelling or mystery, and giving clues throughout your performance to give context about an underlying story. Hope this helps!