You can try some popular fanfiction websites like Archive of Our Own (AO3). It has a vast collection of fanfictions on various topics, including this one. Just use the search function and type in relevant keywords like 'Fleur has a crush on Hermione' and you'll likely find several stories.
Another option is Wattpad. Although it has a wide range of content, including fanfictions. It might not have as extensive a collection as AO3 for this particular topic, but it's still worth checking. Some authors might choose to post their works there, so search carefully using the exact phrase to increase your chances of finding relevant fanfictions.
One possible plotline could be Fleur struggling with her feelings. She might be in a situation where she has to interact with Hermione a lot, like during some magical events or projects at Hogwarts or in the wizarding world. And she gradually realizes that her feelings are more than just friendship.
One idea could be a story where Fleur tries to subtly show her feelings to Hermione through acts of kindness, like leaving her little gifts. It could start with Fleur realizing her crush when she sees Hermione's intelligence during a study session in the library.
It could be developed by having Fleur first struggle with her feelings internally. She might be confused because it's not a common type of attraction in the wizarding world. For example, she could write in a diary about her feelings for Hermione.
Fanfiction.net could also be a place to search. However, the tagging system there might not be as detailed as AO3. You may need to dig a bit deeper by using the search function and looking through different categories related to Harry Potter fanfiction.
One common plotline could be Hermione forming a closer friendship with Fleur. Since she hates Ron, she might turn to Fleur for support and they could end up having adventures together, perhaps in the wizarding world outside of Hogwarts.
A less common but still interesting trope could be the 'time - travel' trope in relation to them. For instance, if Hermione were to go back in time and meet a younger Fleur, or vice versa. This could lead to all sorts of interesting plot developments as they interact with the past or future versions of each other and the events in the wizarding world.
Often, they are put in situations where they have to rely on each other. Like in a dangerous magical quest. Hermione's knowledge of spells and Fleur's combat skills are both needed. At first, they might argue about the best way to proceed. But as they face challenges together, they see the value in each other's ways. They start to respect their differences and it becomes a strength in their relationship.
Well, if Hermione has a crush on Fleur in the fanfiction, it could make things really interesting. For example, it might create some jealousy among her friends, especially if they don't understand her feelings. Ron might be really confused and a bit put off, since he has his own complicated relationship with Hermione. Harry, on the other hand, might be more understanding but still a bit surprised. And it could also change how Hermione approaches her studies and her role in the wizarding world. She might be more distracted, or she could be inspired to be more like Fleur in some ways, like being more confident in social situations.
In fanfictions, the fact that they come from different backgrounds adds to the allure of their relationship. Hermione is a Muggle - born witch, and Fleur is part - Veela. This difference leads to unique storylines where they bridge cultural and magical gaps. Also, their relationship challenges the traditional views of relationships in the wizarding world, which is exciting to read about. They often have to fight against prejudice and misunderstanding, making their bond stronger and more engaging.
Harry might be a bit flustered at first. He's not used to the attention from someone like Fleur. He could be shy and a bit unsure of how to handle it.