In a 'Harry Potter loves the Dursleys' fanfiction, it could start with Harry realizing that the Dursleys' behavior was out of fear of the unknown, the wizarding world. He might start to empathize with them. Maybe he discovers that they were threatened by Voldemort's followers to keep Harry in the dark about his heritage. This new understanding could lead to him forgiving them and eventually loving them. Also, it could be that a magical accident makes the Dursleys more likeable. For example, a potion that changes their personalities slightly. Harry then gets to know this new side of them and his feelings towards them change to love.
Perhaps in the fanfiction, a spell goes wrong and Harry loses his memories of the Dursleys' bad treatment. He then only sees the good in them like how they provided him a roof over his head. As he interacts with them without the prejudice of past memories, he forms a bond and eventually loves them. Another plot could be that the Dursleys are forced to go into hiding in the wizarding world with Harry. There, they see the world through Harry's eyes and change for the better. Harry, seeing their transformation, starts to love them.
One possible plot could be that the Dursleys receive a threat from the wizarding world that they can only be protected from if Harry stays with them and helps. Harry, being a good - hearted person, decides to do so and in the process, he starts to understand them better and grows to love them.
Perhaps Harry uses his influence among his friends. Hermione could help him find some loophole in the Muggle - wizarding laws regarding property. Ron might provide some comical support, like trying to use some half - baked spell to make the Dursleys uncomfortable enough to leave. In the end, Harry evicts them and takes over the house, turning it into a place that's more welcoming for himself and his wizarding friends when they visit the Muggle world.
Perhaps Harry sues the Dursleys for false imprisonment. He realizes that all those years of being confined to his room or the cupboard were illegal. He enlists the help of Hermione, who is well - read in both wizarding and Muggle laws. They present a strong case against the Dursleys. As a result, the Dursleys face public humiliation in their neighborhood, and Harry finally gets the justice he deserves, while also starting to heal from the trauma of his childhood.
One possible plot could be that the Dursleys, out of their long - held hatred and envy, finally find a way to use dark magic against Harry. Maybe they make a deal with some dark wizards who provide them with a powerful curse. They manage to cast it on Harry when he's at his weakest moment, perhaps during one of his vacations at Privet Drive.
In this fanfiction, perhaps the Dursleys' constant abuse and neglect cause Harry to have some sort of mental or physical disability. It might show how he has to overcome not only the challenges of the wizarding world but also the trauma inflicted by his Muggle relatives. For instance, he could have problems with his legs from being locked in a cupboard for long periods, which would be a physical crippling, and then have to deal with the self - doubt and fear that comes with it.
One possible storyline could be that the Dursleys' pet, perhaps their cat, discovers Harry's wizarding abilities before the Dursleys do. It might then have some comical or tense interactions with Harry, like trying to stop him from using magic in the house for fear of getting in trouble itself.
One possible motive could be extreme revenge. After years of being mistreated, locked in a cupboard, and generally being made to feel unwanted, Harry might snap in fanfiction. Another could be a sense of self - preservation if the Dursleys were somehow involved in a plot against Harry's life in the fan - created plot.
One possible plot could be that evidence of their abuse towards Harry finally surfaces. Maybe a wizarding neighbor who has been secretly observing them reports their cruel treatment of Harry to the wizarding authorities. Then they are arrested and sent to a wizarding jail, where they struggle to adapt to the magical world's justice system.
In this kind of fanfiction, perhaps Harry is rescued by the Order of the Phoenix earlier than in the original story. They might have realized the Dursleys' mistreatment sooner. Then Harry could start his magical training earlier, away from the hostile environment of the Dursleys' home. He may also form closer bonds with other members of the Order, like Sirius, who could play a more active role in his upbringing.
I'm not sure about a specific 'Harry Potter loves the Dursleys' fanfiction off the top of my head. But think about it. In the original story, the Dursleys were so cruel to Harry. So for a fanfiction to have Harry loving them, it would probably involve a lot of backstory changes. Maybe in the fanfiction, the Dursleys had a change of heart early on and treated Harry better. This could lead to Harry developing a sense of love for them. You should look for fanfictions that focus on character redemption arcs for the Dursleys to find ones that might fit this concept.
The Dursleys are a rather uptight and narrow - minded family. In this fanfiction scenario, they could be extremely judgmental of Harry's girlfriend. They might look down on her if she doesn't fit their idea of what a proper person should be like. They may also be secretly afraid that she will expose their mistreatment of Harry, so they could act very defensively during her visit.