I'm so sorry to hear about your friend. Suicide is just so so sad.

People who have never struggled with mental illness just can't understand that though process...my thinking [during a very deep depression] was that my family and friends would be better off without me. Having to deal with me was just a pain in the ass, a burden if you will. I was screwing up my kids and my husbands lives; they'd be better off without me. I know many people say that suicide is just selfishness, but in MY mind, I was going to do them a favor. Thank God I didn't, and I got the help that I needed. I hope you are able to find peace. Take care.