I just read a book called The Suicidal Mind" by Edwin Schneidman, PhD. He was the world's expert on the suicidal mind up until he died at the age of 91 in 2009. The book opened my eyes to my own suicidality.
He states that suicide isn't because of depression but because of psychological pain that has gone beyond one's coping skills. When a person feels trapped - that there is "only one solution" to the pain - the person chooses suicide. When the person gets "constricted thought" - that is can't see any way out except suicide - then that person loses the ability to 'see' children, spouses, others who might need or miss them. It also explains why severely depressed people who start on anti-depressants might commit suicide. You finally get out of your fog and see suicide as the only option to cease feeling pain.
It also explains why non-depressed (people described by loved-ones as not having been depressed) or people with bigger problems than depression (like PTSD) commit suicide. In fact, when you look at statistics, MDD isn't as likely to result in suicide as PTSD is. According to Dr. Schneidman's book, it is the amount of perturbation, not depression - that incites the problem. Then it is the lethality of a person's thoughts - "only one solution to the pain, ie suicide" - that cinches the person's fate.
Schneidman said that the way to alleviate suicidality is to alleviate the psychological pain by decreasing the atmosphere of feeling trapped. In otherwords, if you're living at Defcon 5 then what is needed is to decompress the situation by removing those things that are making you feel trapped or getting help with those things. By decompressing or moving to decompress some of those things, you can get to Defcon 3 and live forever. It may mean you need to get out of a destructive relationship, or restructure your debt, or find a new job.
Losing your fear of death is a means of subintentional suicide - just like being an alcoholic, smoking, over-eating, using drugs, being anorexic. Whatever it is you are doing that will help you cease living - because suicide represents the cessation of the psychological pain - represents suicide per Schneidman. So Omnia you are totally correct: your daughter cannot save you. Just like my daughter cannot save me.
So I have been decreasing my own psychological pain (instinctively it would seem.) I cut off communication with my mother and my brother for the time being. I've made a list of things that I need my husband to do to help defuse my distress, and he will have to comply or I am going to separate from him. I already had made a job change - again an instinctive move - which allowed me to work with people who actually care about patients like I do.
Sorry I wrote so much - but this book as given me an insight to my lifelong desire to kill myself.