I can't fix myself so how do I move on?

I am in a deep depression and have been for a long time. I'm 31 years old and have absolutely nothing to live for and no one who cares. I'm the kind of person who, if they died, you'd say "How sad " and move on to talk about how everyone saw it coming for years. I don't do anything and I don't have friends. I have let myself go and stopped trying to fix it because it feels like there's no going back atp. So I bed rot. I spend all day in bed, in my dark room, and sleep. I wish this was over.....

(no pms plz)