If Only I Had Told Her by Laura Nowlin
Laura has a way of making the characters feel real to me. Her way of writing makes it where I couldn't put the book down even though I was choking back tears at many points. It is a gut wrenching story that leaves you pining for more -- to know what could have and should have been between Autumn and Finny as well as what the future holds for Sylvie, Jack, and the mothers.