God takes some people out of your life so that you would stop leaning on them and begin to lean on God. Everyone's arms get tired, but God will never get tired of you.
Ever heard the saying "Let go, and let God?" In life we must know that ultimately there will be times that we are uncomfortable, and sometimes we experience things that are out our control such as losing friends. What we must all realize is that though many of us are full of great strength, we are not invincible, and that it is much better to depend on the strength of God to make it through tough times, instead of depending on our own hearts or any other person's.