Feeling bitter due to friends' ignoring warning signs of depression

I'm feeling so frustrated, like I basically have no supportive friends even though I have tons of friends. Apparently not a single one of them cares that I am depressed. It makes me wonder why people act so surprised when their friends take themselves out of this world. How can they not see the signs!?

I guess I'm talking about me specifically, I can't know how many signs other people have shown but I am flabbergasted at how my friends are not picking up on this. 

- I'm always posting on Facebook about depression (and my friends like my other posts but ignore these)

- I stopped using Facebook for 6 months (after posting almost every day for 20 years) and nobody noticed

- I tell my friends I am struggling just getting through life and they continue to talk about themselves as if it was nothing

- I have gotten more quiet when around my friends and often stare out the window in my own world and they don't even notice

- I have lost the motivation and interest to go places and do things so they just do stuff without me and don't think anything of it

- When they find out that I went to see a psychologist and they literally don't even say anything

- I had to quit working for many years because I couldn't handle it and when I give a reason for not being able to handle working at a specific place, they say it's because I am getting too used to being at home all the time (when in reality it is depression, anxiety, and autistic burnout- which I talk about all the time but they just conveniently forget that when they want to be right about something).

Some people might say that I just need different friends but this is how they all are. These are also friends that I have known for a few decades. It almost pisses me off to the point where I wish I could fake my own death and see how they react. A part of me wants them to cry over me and feel guilty because they are helping to make me not want to be here anymore.

Does anyone else feel bitter like this regarding their friends and how they don't get any support with their depression?