Perhaps in the fanfiction, Harry breaks up with Ginny because of a misunderstanding. For example, there could be some false rumors spread about Ginny, and Harry, being impulsive, believes them without giving Ginny a chance to explain. Or it could be that Ginny's family, the Weasleys, might be involved in some situation that Harry doesn't want to be associated with, even though it's a misunderstanding, and he decides to break up to avoid the complication.
It could be due to a prophecy or some sort of dark magic influence. There might be a prophecy that says being with Ginny will lead to some terrible fate for the wizarding world. Or a dark wizard could have cast a spell on Harry to make him break up with Ginny as part of a bigger evil plan. Harry, not fully aware of the real cause, follows his suddenly changed feelings and breaks up with her.
One possible reason could be Harry's fear for Ginny's safety. In the wizarding world, he has so many enemies, and he might think that being with him puts Ginny in constant danger. Another reason could be his own insecurities. Maybe he feels he's not good enough for her despite all his achievements. He might also be so focused on his fight against dark forces that he believes he can't give Ginny the time and attention she deserves.
Perhaps in the fanfiction, Edward breaks up with Harry due to a lack of communication. They might have busy lives and gradually stop sharing their thoughts and feelings with each other. As a result, small issues build up over time and create a rift between them. Or it could be that Edward has fallen out of love. Love can be fickle, and he might have met someone else who makes him feel more alive and attracted, causing him to end things with Harry.
One possible reason could be that Ginny realizes Harry is too preoccupied with his heroic duties and she feels neglected. In fanfiction, this is a common trope where the female character desires more attention in a relationship.
One possible reason could be that their different post - war career paths put a strain on their relationship. Harry might be too consumed with his Auror duties, constantly in danger and away from home, while Ginny is focused on her Quidditch career. Another reason could be the pressure from the public eye. As two well - known figures in the wizarding world, the constant scrutiny and expectations from the public might be too much for them to handle together.
One possible reason could be that Ginny feels overshadowed by Harry's fame. In the wizarding world, Harry is a hero, and constantly being in his shadow might make Ginny feel like she's losing her own identity. Another reason could be differences in their future plans. Maybe Ginny wants to focus on her Quidditch career and travel around the world for matches, while Harry is more committed to his work at the Ministry, and they can't find a compromise.
It could be because of the pressure from their respective families or the wizarding society. Their relationship was already controversial, and the addition of a pregnancy might be too much for Harry to handle. So, he decides to break up rather than face all the potential problems.
Maybe in the fanfic, Harry discovers some differences between him and Ginny that he hadn't noticed before. For example, their future plans might not align. Ginny might want a more settled life at Hogwarts or in the wizarding community, while Harry feels an urge to explore the wider magical world and perhaps even try to improve relations with non - magical communities. These differences could lead to their break - up.
One possible reason could be the trauma they both endured during the war. Harry especially might have post - war issues that make it difficult for him to be in a relationship. He could be haunted by the deaths he witnessed and feel unworthy of love. Ginny, on the other hand, might have grown tired of waiting for Harry to fully recover. Another reason could be the different paths they want to take in life post - war. Harry might feel a strong sense of duty to help rebuild the wizarding world in a way that doesn't involve a relationship, while Ginny may want a more stable family - oriented life right away.
One possible reason could be that Edward feels he is putting Bella in too much danger. In the 'Twilight' universe, his vampire nature attracts various threats. Another reason might be that he realizes their different life expectancies and doesn't want Bella to have a future filled with sorrow. Maybe he also fears that his control over his vampire instincts might fail one day and he could harm her.
One possible reason could be miscommunication. Maybe Ginny did something without fully explaining her intentions to Harry, and in the heat of the moment, he yells. For example, if she made a decision about their relationship without consulting him first.
Well, it could be that the fanfiction is trying to show Ginny's jealousy or resentment in a new light. Perhaps she's jealous of Harry's fame or the attention he gets. Or maybe the writer is simply exploring a 'what if' scenario where Ginny and Harry's relationship took a different turn from the start. In the original story, they end up together, but fanfiction allows for alternative storylines, and this could be one of them where Ginny hates Harry for various reasons that might be related to their different personalities, goals or the pressure of the wizarding world around them.