Complex sentence: During her intensive relationship with Keith Richards, she begins to recognize the dark side of the shiny glamour world she lives in: the isolation of the stars, and the groupie-filled milieux of anonymous hotel rooms--this is not her idea of life.
Split into simpler sentences: During her intensive relationship with Keith Richards, she suddenly starts to recognize the dark side of the shiny glamour world she lives in. The isolation of the stars, and the groupie-existence in anonymous hotel rooms--they don't get along well with her idea of life.