It is very hard to help someone to see the good parts of life if his/her vision of life is rather miserable. If you want to do it as it shoud be done, you should give some e.g.'s, not a critique ( and for me your post was something like that, but I also know now that your intentions were good
) Suicide - yes, a very serious problem, but the multifactorial etiology complicate the whole thing. The first thing- suicide is not always connected with FXD negative attitude. It is more often caused by a sudden distress, and connected with very deep emotionaly caused state of one's mind.