C155 Erroneous recognition

What did the meaning of the lyrics in the song mean? Could it be that An Rushuang knew me from before? Or was the person waiting in the song she sang someone else?

Thinking to this point, an overwhelming sense of powerlessness surfaced in my heart. Only now did I clearly understand how important An Rushuang's position in my heart was.

Don't let your thoughts run wild! Maybe it was just a song