Sometimes people come into your life and then leave it again. Learning to let go when they are gone can be difficult. It has taken me a long time to figure out how to do that. I believe that these people are sent into our lives to teach us something and when they leave us, it is because we have learned all that we could from them.
I have recently lost a friend, who just walked away over relative non-sense. I am not sure exactly what I was supposed to have learned from her, but I must have learned something. Perhaps it is just not to let too many people get close to me. I am not sure, but what I am sure of, is that eventually I will figure out what it is when the time is right.