It is not primarily a love story.
I have complicated feelings about this one. The writing is genuinely good and the emotional core — what Lily experiences and how she processes it — is handled with more nuance than the genre often manages on difficult subjects. The reason I am giving four rather than five stars is that I think the marketing of this book as pure romance has misled readers who were not prepared for what it actually is. It is not primarily a love story. Judge it as what it actually is and it is excellent.