Maturity or recovery is the "something stronger". This song is written by the self-destructive younger self, which puts "fun" above health. It's losing the battle, and it's arguing its case by accusing the growing healthy self of arrogance ("my blood is not that colour anymore"). "Get out" means, "don't turn into a tool, kill yourself instead". The lyrics are pretty literal.
Maturity or recovery is the "something stronger". This song is written by the self-destructive younger self, which puts "fun" above health. It's losing the battle, and it's arguing its case by accusing the growing healthy self of arrogance ("my blood is not that colour anymore"). "Get out" means, "don't turn into a tool, kill yourself instead". The lyrics are pretty literal.