Well, some writers might want to explore a different side of Bella's character. By having her reject Edward, they can show her as a more assertive and independent figure, not just defined by her relationship with him.
Well, it offers a different take on the original story. People like to see how the characters can develop in new situations. When Edward rejects Bella, it's a big change from the norm in the Twilight series.
It could also be a way to explore alternative storylines. For example, if Sakura rejects Naruto, it can open up new paths for both characters. Naruto might have to find love elsewhere or focus more on his Hokage dreams without the distraction of a romantic relationship. And for Sakura, it can show her independence and her own journey of self - discovery outside of a relationship with Naruto.
One possible story could be where Bella rejects Edward because she discovers a side of him that is too overprotective in a way that suffocates her independence. She might realize that she wants to explore the world on her own terms without his constant interference.
There are fanfictions where Edward rejects Bella for a different reason than in the original story. For example, he might think that being with her will put her in more danger from other vampires or supernatural beings. This then leads Bella to go on a journey of self - discovery, often traveling to different places to learn about the world of the supernatural from a different perspective.
Some writers might do it to fill in the gaps in the original story. Maybe they felt that the kisses in the books or movies could have been more detailed or happened in different circumstances. By writing fanfiction, they can create the perfect kiss scenario for Edward and Bella that they always imagined.
It's a way for fans to add their own creativity to the story. Maybe they felt that the original Edward - Bella relationship was a bit too 'perfect' or 'safe' in some ways. By creating 'dark' fanfiction, they can introduce elements like danger, mystery, and more complex emotions. For instance, they might explore how a darker Edward would deal with his love for Bella, and how Bella would cope with a more intense version of him. This gives a whole new depth to the characters and their relationship.
Some writers might be disappointed with certain aspects of the original story. So they create fanfiction to rewrite parts they didn't like. For example, if they thought Bella was too passive in the original, they could write a fanfiction where she is more assertive in her relationship with Edward. Also, it gives fans a chance to play with the characters' emotions and relationships more freely.
Some writers are inspired by the intense love story between Bella and Edward. They feel the need to expand on it, add more depth, or change certain elements to make it more interesting to them. It's like taking a beloved toy and adding new parts to it. They can create new plotlines, introduce new characters, and build on the world that Stephenie Meyer created.
In some fanfiction, Bella might be afraid of Edward because of his vampire nature. His superhuman strength, speed, and the fact that he could potentially lose control and harm her can be a source of fear. For example, in certain stories, Edward's struggle with his bloodlust is emphasized more, making Bella constantly on edge around him.
Maybe she has read too much of it and found the plots repetitive. For example, many fanfictions might follow the same pattern of their relationship drama.