God, I know the feeling. I was just puttering around on Quora and found some linked comic about how our feelings of meaninglessness - which a character descrbed as a feeling that "you don't matter to the universe, at all" - is basically just megalomania. It's narcissism, a feeling of meaninglessness is a feeling of sadness that the universe doesn't revolve around you. I left some venom-filled comment arguing that the comic was edgily misinterpreting what meaninglessness is.

Though as I think about it, somewhere in that there's truth: there is a sadness that comes from thinking our actions have no higher effect, or that we might not be part of something greater than ourselves. I still contest that that's the same as "wanting the universe to be focused on you all the time" - saying that, I think, is like reprimanding an abused or neglected child who's trying to get some love and attention for being a selfish attention *****. Ridiculous and exaggerated, too strong a condemnation.

Even if you scale it back, though, try to just focus on the Earth itself, there's still an existential fear of being forgotten, being ineffective, being disconnected. And all that's still terrifying and depressing.