When he says " im stuck in a coma, stuck in a neverending dream" he means his life is horrible and he wants to believe hes dreaming of it. And when he says" someday i will wake up and realize i made up everything!" hes saying he wishes that someday he'll wake up from his nightmare of a life and realize nothing ever happened and his life will be good. But then he starts thinking that's never gonna happen he'll never wake up from his nightmare of a life, " i wont be saved".