i spent time in a ward a long time ago and during one of those trips, i had a roommate called "alice". i don't believe this was her real name, so i won't bother giving an alias
very nice, cheery, albeit snarky type of person. made a lot of death/mental illness/suicide jokes. in retrospect, no shit, she was faking that. i didn't really see it back then, though.
to cut the story down, everyone went out to lunch one day and she was staying behind to take a shower, and she came back midway through to get food and sit across from me, beaming, and she told me flat out that she tried to hang herself with the shower curtain and "I suck so hard/am so useless, I can't even kill myself correctly."
point of this is, i couldn't do a damn thing about it.
back then, i don't know if it was just naivete or that mixed with just not being able to control those things, but i was under the impression that we were at least something akin to friends since we opened up to each other and confided in things and vented and whatnot, but it still happened.
and back then, i felt like shit about it too, because i thought maybe i could have been there or said something (also with a lace of 'if she'd said something/reached out, someone could have helped'), and that it could've been prevented if i did so.
nowadays, i know that things are so simple, and even if you're there for them and close and all of that, they might still be hiding something dark because they don't want to burden anyone with it, or don't think they're worth it, or don't want to deal with the panic worry, etc.—and that is not your fault. you're not bad or deficient for it, and you're not at fault for anything that happens. . .and if someone really wants to do that, they'll find a way to try/do it, regardless of their support system (or lack thereof) and options, because they might just not see it that way. i sure as shit haven't lmao.
that said, if i'm in that state of mind and sit at the edge and it takes willpower to keep my last dregs of sanity, i'm not concerned about who is there for support, or who can help me, or who can get me out—it's the pain. and i'm projecting this, but i wouldn't blame any of the people that love/care about me for that decision. they're not the arbiters of my fate, nor the ultimate caretakers of my emotions, and a lot of the time i just can't bring myself to hurt them with that stuff. (i have more self-awareness, though.) if i'm keeping to myself and just ghost on them and something happens. . .they're not at fault for anything. and, like you, they'd be left behind to wonder about the radio silence and panic at some point about the disappearance, thinking they're at fault or they could have stopped it if they were just there.
honestly, you can be there and that's invaluable, but a lot of us reject that or take it for granted when we're at our weakest because it's so damn hard to open up and be vulnerable around people, and there's the whole deal with burdening others with that, when they've got their own problems. it's a warped mindset, but that's the nature of it.
if there's any definitive 'fault' to be had here, i don't think it can be put on you or even her, and please don't eat yourself up inside about it for longer than you need to to get it out. when it comes down to it, you didn't pull the trigger or make the noose or give them the pills or whatever their choice to go out, and being absent isn't a sign of fault.
god, i meandered a lot lmao