why?

I know that the Lord's purposes are wise and I don't expect to understand them. But I just wish I could understand why some of His children feel so alone and hopeless to the point where they feel there is no other choice than to take their own life. We had a family friend who reached this breaking point on Thursday. I don't know any details of what kinds of things he was dealing with but I hope he is feeling better now. Sometimes I wonder, though, how much regret you might suffer seeing your family and children dealing with such a loss. I am not judging, I have certainly entertained the thoughts, as I am sure most of us have at some time, but I just wonder. I hope our friend is free of his pain and knows how much he is missed and loved.