Honestly, if they didn't care about you in life they won't care in death either. So either you're going to hurt someone who cared or have no impact at all.

This is probably a really stupid question but have you tried speaking to them? Not just expecting them to see there is something wrong.

I haven't really followed much of your story, sorry, so I'm not too sure where you are coming from but a really bad habit of mine is expecting people to just know I need help.

If you don't reach out there isn't much someone else can do.