Oh my gooosh, you need to read the Once Upon a Broken Heart series (although, I recommend starting with the Caraval series before reading OUABH, but you don't have to! They're essentially the in the same world/share some of the same characters and are all enemies to lovers) and if you want the very text-book definition of "enemies-to-lovers" then the Cruel Prince is excellent!
Oh my gooosh, you need to read the Once Upon a Broken Heart series (although, I recommend starting with the Caraval series before reading OUABH, but you don't have to! They're essentially the in the same world/share some of the same characters and are all enemies to lovers) and if you want the very text-book definition of "enemies-to-lovers" then the Cruel Prince is excellent!