How can I accept that my best friend is gone?

Accepting that a best friend is gone, is hard and very challenging. It might help if one has anticipated the loss for a time and prepare for grieving. According the Kubler Ross, going through the mental stages of grieving would help accept the loss. There are 5 stages; denial, anger, bargaining, depression and acceptance. These are a part of the framework that makes up our learning to live without the one we lost. They are tools to help us frame and identify what we may be feeling and accept the loss and make take some time. We are then able to move on with life. I hope you'll be able to deal with your loss.