梦非梦人已走远人非人心已离去
[mèng fēi mèng rén yĭ zŏu yuăn rén fēi rén xīn yĭ lí qù]
What happened seems to be like a dream but not quite - it feels surreal, yet it's reality; people have gone away physically, emotionally they are no longer here too. It conveys an air of regret and unresolvable change.