I do believe, Hapsari, one of the most difficult experiences in life is a relationship ending, especially when you are not the one ending it. Emotions cloud us from seeing the lessons to be learned and the wisdom gained from being dumped, left behind, discarded, let go. Often, what causes the most pain is what produces the wisdom that gets us through life.
But, why would we want to be with someone who no longer wants to be with us, who has moved on for whatever reason? Why would we try to keep who or what no longer serves us?
Cry and move on.
Life is fluid. As water flows, so do we.
You captured that lesson in your poem.