I've had many people walk into my life and then walk out, but they have all been good examples to me. Of course I'm sad when they leave. How could i not be when they've hade such a big effect on me. Often times I would become depressed and not want to continue on. Then I found this quote:

"When people walk away from you, let them go. Your destiny is never tied to anyone who leaves. It doesn't mean they are bad people... It just means their part in your story is over"

It made me realize that I don't really NEED anyone except for myself and my savior (Jesus Christ). I do believe that those people came into my life for a reason, but when they leave I've learned my lesson from them. So instead if being sad I try to get on my knees and thank God for sending those people into my life.