i dont care if they never meant to stay.
what does really matter is,
they at least once used to be the person(s) who made me happy
or maybe made me dancing in the shower,
laughing while singing
and smiling while sleeping.
-your life is never tied to anyone,
when people walk away from your life,
that doesn't mean that they are bad people.
it's just their part in your story has just ended.
let it be and live your life!