Some niche fandom - specific forums might also have Harry Bill Sakura fanfiction. You can search for forums dedicated to the fandoms related to Harry, Bill (from the Harry Potter universe) and Sakura (from Naruto universe perhaps). Sometimes fans share their own written works on these forums.
Fanfiction.net is a great place to start. It has a large collection of fan - created stories, including many about Bill and Harry. You can use the search function to look specifically for their stories.
Fanfiction.net is also a good place. There are many different categories and you can find Bill x Harry fanfiction under the Harry Potter section. However, the quality may vary more compared to AO3, so you might need to do a bit more sifting through the stories.
Archive of Our Own is another great place. It has a very organized system for categorizing fanfictions. You can search for tags related to 'bill' and 'harry' and probably find some stories where bill has a role in raising harry.
There are several places to search for it. Firstly, check out the dedicated Harry Potter fanfiction forums. People often share and discuss their favorite stories there, and someone might be able to point you to the 'harry is bill's mate fanfiction'. Also, don't forget to use the search function on major fanfiction platforms. Type in relevant keywords like 'harry', 'bill','mate' and see what comes up.
Fanfiction.net is also a good place. It has been around for a long time and has a large number of Harry Potter fanfictions. Just type in 'Bill raised Harry Potter' in the search field, and it will show you the relevant stories. However, the quality may vary, so you might need to read the summaries and reviews to find the good ones.
Another option is to look for Harry Potter fanfiction groups on social media platforms like Facebook. There are groups dedicated to sharing and discussing fanfictions. Members might be able to give you links or names of fanfictions that feature Harry having feelings for Bill. Just be sure to follow the group rules when asking for recommendations.
You could try searching on major fanfiction websites like Archive of Our Own or Fanfiction.net. Just type in the title or relevant keywords in their search bars.
Some Tumblr blogs are dedicated to sharing and promoting fanfiction. Try searching for 'Draco and Bill fanfiction' on Tumblr, and you might come across some great recs or even find some exclusive stories shared by the community.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of fanfictions from various fandoms, including Bill and Frank. Just search for their names in the search bar and you'll find a bunch of stories.
Well, apart from the popular sites like FanFiction.net and AO3, you might also check out some Harry Potter - focused fanfiction forums. Sometimes, individual authors post their works there directly. Some of these forums have a dedicated section for Bill Weasley fanfictions. Also, if you follow some Harry Potter fan groups on social media platforms like Facebook or Reddit, members often share links to interesting fanfictions, and you might come across some great Bill Weasley ones among them.