You should get together with your friend and you should both talk to each other about it. You will end up helping each other.
Even though I have never had to deal with death before, I would suggest that you try not to stress the matter with your friend. Your friend will open up to you once she comes to terms with the situation her-self. Just be available for whenever she needs a shoulder to cry on.
To respond to this question, click here. This is question number 2.