losing your best friend

I have lost someone very special to me and it hurts like hell.  I am very scared of what the future holds. It seems like things cant get worse, but if I loose this person forever how can my life get better.  I pray everyday that God will help.  The pain feels like sharp jagged edges being thrust in my heart.  I can't seem to force my self to give up something that I don't have.  I have tried to have faith in the saying that God doesn't give you anything you can't handle.  I don't even know how to make since of anything.  I dont have any idea how to handle this.  I am sure there has to be light and the end of the tunnel, but I am to out of focus to find it.  I can't sleep bc that if I do it's one more day that I have to deal with what I lost. I have been taking all kinds of medicine and nothing is making me sleep.  I have never been in so much pain before.