As indicated by the title, the theme of friendship is central to this novel. The narrative structure retrospectively presents Elena and Lila’s childhood, making the readers aware that, over time, their friendship endures. The novel conveys occurrences from both of the girl’s childhoods and puberty, showing the influence that their friendship has on both of them. Their friendship began when they were children and it shaped them into the adults they would become. The novel presents this friendship ambivalently, making it rather interesting. This means it becomes painful and even destructive, particularly for Elena. Whilst most romantic relationships in literature are frequently presented as being tempestuous and volatile, friendships — particularly those between female characters — are often seen as supportive and positive. This novel is exceptional in giving consideration to the darker facets of female friendship, particularly the most competitive aspects of it.