I don't just have this thought when in a difficult place I also have it when things are steady in the nothing-much-happening-zone. It just floats up -- yep that's how it will all end, I'll kill myself. It's so casual and sinister.
I admire how you expressed it - casual and sinister. I'd say that yes, I get that quite often. For me, it's a very misleading thought, because I will not be aware that I'm low, and yet, there it is, that assumption. I try and remember that it does mean I'm depressed, even if I feel 'OK'. It's not actually a rational thought, because you can't actually know (if that makes sense). It's a distorted thought. The best way for me personally to deal with it is just to back myself up and change how far into the future I'm letting myself look. So, if I'm dealing with setting something up for many months from now, at work (say), and I get that thought - that I'll have killed myself before I make it that far - I just back up, and try and narrow my awareness to as small as it needs to go (which these days, is usually like, I can think a few days ahead, max).
I also felt better when I found out that there's a name for it. It's chronic suicidality (which refers to chronic ideation). It's a symptom, like any other symptom. It takes me a lot of work, sometimes, to see it as a symptom (because it feels like such a coherent thought). But you are not alone, at all.
I don't know that many people understand this type of thing. It isn't (for me) like being 'suicidal'. I actually don't want to
Commit suicide. At.all. Makes no sense I know, but I can't imagine calling a friend about this and saying 'hey, you know, I am not suicidal but I am pretty sure I have a part of me that wants to die.'
I don't know if this helps,
@shimmerz - I agree that most people cannot grasp how to even have this conversation.
But I think it does make sense to say 'I don't want to kill myself, but I am having a hard time understanding how to stay alive, because the pain and sadness is so intense.' Some version of 'I don't want to die but I don't know how to live'.
I'm not suggesting that this is something that suddenly, random people will be able to deal with, just by re-phrasing it. Only that framing it that way can help a listener move past the 'I have to stop their crisis' place (which really, they will be unsuccessful at) and into the 'I can listen because they are hurting and I don't have to fix it'. When I'm talking to mental health professionals, especially, I feel safer using that kind of frame. So they hear upfront that I don't actually want to kill myself.
I guess I'm trying to say, that I understand that feeling of not knowing how to avoid it. I don't know how to avoid it. And I still believe it's going to end up being the way that I go, when I go. Oddly, that usually makes me sad (not relieved), and that sadness can tell me that it's not what I want, it's just that I don't know any other way to think about the future right now.