Oh honey, I am so very sorry you lost a dear friend to suicide.
Unfortunately there have been multiple suicides in my family, and my own DS22 has had two serious attempts. This is a very very hard thing to deal with.
There are 2 very important points I would like to make about suicide.
1. Those that committed suicide were in relentless pain and only wanted the pain to end.
2. These people are NOT selfish, weak, or thoughtless. They are people in a severe and desparate state of agony.
For those wanting to learn more about suicide please read Kay Redfield Jamison's book, Night Falls Fast. But be forewarned, it is brutal and graphic.
Again, I am so so sorry for your loss. my thoughts and prayers are with you and your friends family.