Take note of who remains in your life when times get tough, especially the people who sacrifice the resources they have in their life to help you improve yours when you need it most. Seriously, when you come out the other side of a difficult period in your life, look around you. The people still standing beside you are your true friends. - via: http://www.marcandangel.com/2013/07/21/9-things-a-true-friend-would-never-do/
We rarely lose friends and lovers, we just gradually figure out who our real ones are. So when people walk away from you, let them go. Your destiny is never tied to anyone who leaves you. It doesn't mean they are bad people; it just means that their part in your story is over.