The speaker feels invisible and not good enough. They sit among people day after day, but no one knows them or tries to, so the days blur into one long stretch of isolation. Their mind fills with worries about not having enough, not giving enough, and being only a copy of their parents. Even their effort to be their best self feels like it falls short.
Underneath the numbness is real grief. The speaker mentions losing someone they loved while on bad terms, and missing someone they grew up with, a pain that doesn't depend on how close they were. They stay for the few people who care, even though they don't believe they deserve that care themselves. The ending, though, holds a thread of hope: they want to live as themselves and one day be someone's "everything." The mood is heavy, tired and quietly honest, with a small light at the close.