When people walk away from you, let them walk. Do not talk another person into staying with you. Do not talk another person into calling or caring for you.
When people walk away from you, let them walk. Your destiny is never tied to anyone that left. People leave you because they are not joined to you and if they are not joined to you, you cant let them stay let them go.
It does not mean that they are bad people, it just means that their part in the story is over. You have got to know when it is over, let it go.