It is impossible to be abandoned. In this Earth School everyone you meet arrives and departs on schedule to teach and mirror you. When someone moves away from your life experience the un-empowered perception is to choose to feel abandoned and victimized.
High self-esteem says to the other person, no matter what the circumstance, 'Thank you for the gift of your presence and all that I have learned from you. I send you love and set you free right now.