Nothing works to totally make sense of death and suicide but sometimes words and ideas can help. Here are a couple of articles that I found helpful and useful.
Here's an article that Rev. John Odhner wrote about what we can learn from the Writings/Swedenborg about suicide: "Reflections on Suicide". (You can also download a Word doc version of it here.)
And here's an article that Rev. Brian Smith wrote about the wounds that come from losing a friend: "Tearing".
And here's a post that Rev. Mac Frazier wrote about despair.