Yes I know there are forums for parents of children that have committed suicide. I would like to use a different route and ask my questions to those that are considering suicide.
I have one child, my son, who was 20 and committed suicide about 3 months ago. It has left me beyond devastated to the point of considering this myself.
Firstly, I am truly saddened by and sorry for your loss.
I will try and answer your questions. I can only speak for myself, I'm just one person, everyone is different and will have their own experiences, reasons, and decisions etc.
Questions for those here and reading this:
Why is there almost never a note, the not knowing why in most cases is brutal in itself?
I cannot speculate on your case, it would not be right.
But for me, there is no-one I would want to say anything to. The only people that I would normally be expected to leave a note for I dislike very much indeed. The unknown element is a deliberate part of what is left behind in my case, finally being free on my terms if you like.
To speculate in the general case, I think this is such a tricky task to get right it can get side-lined against the bigger picture, and then becomes too much to undertake once the line has been crossed to end ones life, and so has to be left undone. Maybe some people can't simply face doing it. Or they think it is not good enough, like an author discarding draughts of their work. Perhaps they would dearly love to but find it impossible to put it all into words to their closest loved ones. Many people report agonising over their notes for a long time, unable to get it right, then maybe give up as it has become too much of an obstacle and an extra burden.
Many people report being rejected or not taken seriously when they open up to people IRL about their suicidal intentions, so maybe feel that the people that will be left behind had their chance to help and be part of the experience but were not that bothered or interested. Maybe they want to give what they perceive as this tortuous world one last punch.
It seems these do not apply in your case. I am certainly not suggesting any of this does, I'm just generalising.
Do you think what damage this will cause your parents?
In my case, when I tried to be open about my intentions they simply responded "Oh well, there have already been suicides on all sides of the family", as if it's perfectly normal and so crack on with it if you want to. I have informed them of my situation and intentions, there will be no surprises. (I am not young anymore and already into the last third of my natural life expectancy anyway).
In a lot of cases as with mine this goes completely undetected, how do you go about a normal day then take your life without confiding in someone?
I would think that the vast majority of people who end their lives have almost zero "normal" days for a very long time preceding them taking their lives. What the outside world may see is a completely different topic, perhaps there should be more focus on the awareness of those people instead. Many people report trying to open up to those closest to them only to be misunderstood or rejected, so they may keep it to themselves thereafter. Making the decision to end ones life can be extremely liberating and cathartic, it was for me. People may experience a newfound calm and happiness once this line has been crossed. I think this is quite common. Again, I do not suggest any of this applies in your case.
Which brings me to, is there usually someone or a group be it online or in person that does know, I just did not see that side?
I suppose this is case by case. In mine, I've told quite a lot of people IRL including all immediate family etc. of my intentions. No-one seems that bothered. We're not especially close.
You can see for yourself the amount of activity sites like this attract. The "real" world simply doesn't see things the same way.
Is there usually something that has caused you to want to leave this life, or do you just not want to live for various reasons?
Yes. There is a huge body of personal stories and information on this site if you want to find out more. I haven't shared my personal reasons on here yet.
Does anyone give thought to what is beyond, not wanting to get into a religious debate, just curious if you think about the "next" step?
That is something we all have to rationalise. My 2 cents; we are all going to die. It's no big deal, really. Some people commit horrific acts during their lifetime, whereas I think I am a relatively decent person overall.
Just because some other groups/authorities (like the church) say it's not allowed doesn't bother me. I'm not religious. It's my life, and I didn't ask for it. Personally I don't believe there is a heaven-like afterlife.
Once again I am truly sorry for your loss.