Recent Love Letters book I can’t remember

It was a vibrant red paperback book and was square. I believe I found it in the “poetry, drama, and literary criticism” section of Barne’s and Noble. I’m unsure how old it is, but I read it sometime in the past 2-3 years. It was a collection of letters individuals submitted for the purpose of being compiled in this book. People could submit via social media or via letter, and the book begins by telling you some of the demographic data of all the submissions. People were offered to send in letters about crushes, their partner, or even ex’s. Using these, they separated the book into 3 sections of general themes of falling in love, being in love, and falling out of love. I remember sometimes they included photos if the person submitting the letter had included them with their submission.