My experience in using social media platforms has been acquired through my personal use of using social media sites. Further knowledge has been gained through university where their was a strong focus on executing social media campaigns.
when someone walks out of your life, let them. there is no use in wasting your time on people that leave you. what you make of yourself and your future is no longer tied to them. yeah, you may miss them. but remember that you weren't the one that gave up!