MLM book that changed your life

I‘m looking for something similar to „The song of achilles“ Not in the greek mythology sense, but in the emotional depth and the way their relationship felt. I loved all of the poetic ways they talked about the love they felt for each other. What i’m looking for is a book that truly impacts the way you view love. I want fluff, angst, smut and everything in between. If you got any recommendations drop them down below!