First, create complex characters. Give the enemies deep-seated reasons for their animosity, like a past betrayal or a clash of values. Then, introduce a catalyst that forces them to interact more. It could be a shared project or a mutual friend in need. As they interact, show the gradual change in their perception of each other. For example, they might start to notice the other's good qualities, like the enemy's kindness towards animals. Slowly build the romantic tension, with stolen glances and small acts of kindness. Finally, have a moment of realization where they both admit their feelings.
Start by establishing a strong conflict between the characters that makes them seem incompatible. Then, introduce situations that force them to work together and gradually reveal their hidden vulnerabilities and commonalities.
To write such a story, think about what could make them lose trust and respect for each other. It could be a life-changing event or a series of small incidents that accumulate over time. Also, show how their emotions change and how they struggle to deal with the transformation of their relationship.
You need to build up strong character conflicts at the beginning. Make their differences clear and intense. Then, introduce situations that force them to work together and gradually reveal their hidden commonalities and vulnerabilities.
One great example is 'Attachments' by Rainbow Rowell. It has an online aspect where the main characters start as sort of enemies in a work - related online environment. Lincoln, the IT guy, has to monitor the employees' emails for inappropriate use. Beth and Jennifer are two employees who often send emails that Lincoln reads. At first, he seems like an enemy invading their privacy, but as he gets to know them through their emails, he falls in love with Beth. It's a really sweet story that shows how an online connection can transform from something negative to a romantic relationship.
One great 'enemies to lovers' fantasy novel is 'A Court of Thorns and Roses' by Sarah J. Maas. It has a great build - up of the relationship between Feyre and Rhysand. Another is 'The Cruel Prince' by Holly Black. The dynamic between Jude and Cardan is full of tension and eventual love. Also, 'Shadow and Bone' by Leigh Bardugo has some elements of this trope as well.
Some excellent 'enemies to lovers' fictions are 'Cruel Prince' by Holly Black. Jude and Cardan are enemies in the faerie world. Jude is a mortal living among the faeries and Cardan is a cruel prince who bullies her. But over time, their relationship changes into something more passionate. 'The Cruel Prince' shows how power dynamics and initial hatred can transform into love. Also, in 'The Vampire Diaries' book series (although it has a TV adaptation too), Elena and Damon start off as enemies. Damon is a vampire who seems menacing to Elena at first, but as the story unfolds, they develop a deep and complex relationship that has elements of love despite their initial enmity.
One popular trope is the 'forced proximity'. For example, they get stuck in an elevator or on a deserted island. This forces them to interact and see each other in a new light. Another is the 'secret admirer' where one of them secretly likes the other even while being enemies publicly. The 'betrayal reveal' is also common. Maybe one discovers that the other was wrongly accused of something, which changes their feelings. And of course, the 'slow - burn' where the transition from hatred to love is very gradual.
A good example is 'Wuthering Heights' by Emily Bronte. Heathcliff and Catherine have a complex relationship that starts with a sort of enmity. Heathcliff is treated as an outsider by Catherine's family, and their different social standings create tension. However, they share a deep, passionate connection that evolves into a tortured love. Also, 'Red, White & Royal Blue' by Casey McQuiston features Alex and Henry who are from different worlds (America and Britain) and initially have a sort of rivalrous relationship which then blossoms into a beautiful romance.
One important method is through dialogue. As they start to talk more, they begin to understand each other's motives and personalities. In some novels, a gradual revelation of the characters' true selves plays a big role. For instance, the 'enemy' might show a vulnerable side that the other character didn't expect. This can break down the barriers between them. Also, the setting can contribute. If they are in a new and unfamiliar place together, it can force them to depend on each other and change their relationship dynamic.
Well, start with creating characters with distinct personalities that complement each other as friends. As the story progresses, make one character start to notice little things about the other in a different way. Maybe they notice the way the other smiles or how they're always there for them in a new light. Then, throw in some obstacles like family or friends not approving at first. This adds drama. And when they finally get together, it feels more satisfying.