I'm so sorry you are going through this
I know the feeling and it can be hard to read about reaching out to get out of a depression when your environment isn't responding. That always sends me down the spiral. But: You are not responsible for their reaction. If you ask for help and you don't get it, it isn't your fault. You just haven't been understood and that hurts, but it doesn't mean that you in fact cannot be understood. It is so important to know the difference.
What I found helps me a bit is imagining the reaction that I long for. Basically I listen to the Live Awake podcast and tell myself all the things I wish to hear from a friend or my family or I remember a moment when a true connection was possible and I felt accepted by someone. I try to reconnect with the part of me that feels lost and it eases the pain a bit.
Know that you are worthy, and you are loved.
If crying helps, then cry. If you decide you need to try something new, do that. You are definitely not the only person on earth feeling this way. Don't give up and try to be good to yourself.
(((( hugs ))))