Circus for a Psycho Lyrics Meaning

This song is about a person who was bullied all their life by a person, and he's had enough. "You push me till I break and the anger turns to rage" means that that person was been pushed around by the bully, and that he's had enough. "You're killing me slow but I ain't ready to die", means that the bully has been breaking the person (physically or emotionally). "Tonight, get ready for a fight, so now you know it's time to ride this circus for psycho", means that the person is going to fight back.