I don't think we'll meet again. What is this song about?

Regret and helplessness after breaking up, nostalgia for the past and hope for the future. According to the introduction of the song "Let's Never Meet Again", the lyrics in this song express their fond memories of each other and their expectation for the future, but in the end they can't be together for various reasons and also express their hope for the future. Even if we can't be together again, I hope each other can live a happy life. This song conveys a sincere, sad and blessed emotion.