Fanfiction.net might also be a good place. There are numerous Sherlock Holmes - related fanfictions. However, the interface might not be as user - friendly as AO3 when it comes to finding specific relationship - based fanfics, but with some searching, you can surely find some great 'Sherlock loves John' stories.
Look for the moments where Sherlock gets extremely protective of John. It's a common trope in fanfiction for Sherlock to jump in front of danger to shield John. This protective instinct is a strong indication of love.
In many Sherlock/John fanfictions, Sherlock's actions towards John show deep affection. For example, he often goes out of his way to protect John from danger. He might put himself in harm's way just to keep John safe, which can be seen as a sign of love. Also, his jealousy when John pays attention to others can be an indication. In some fanfictions, Sherlock is overly possessive of John's time and attention, much like a person in love would be.
You can try Archive of Our Own (AO3). It has a vast collection of fanfiction, including many fem John x Sherlock ones. Just use the search function and type in the relevant tags.
Fanfiction.net is also a good place. There are many John Sherlock fanfics there. However, the quality may vary, so you might need to read the reviews or summaries before diving in. Some authors on this site have been writing John Sherlock fanfic for years and have a loyal following.
Some fanfictions explore the domestic side of their relationship. Imagine Sherlock and John living together, sharing daily routines, and how their love blossoms in this more mundane but also very intimate setting. There are also themes around jealousy, especially when new characters are introduced into their world and how they deal with it in the context of their relationship.
Try using search engines. Type in 'John hurts Sherlock fanfiction' and you'll get a list of relevant links. You can also join Sherlock - related fan groups on social media platforms like Facebook or Reddit. Members often share their favorite fanfiction stories, and they might be able to point you to some great John hurts Sherlock ones. Additionally, Tumblr has a lot of Sherlock fans who post about and recommend fanfiction.
You can try Archive of Our Own (AO3). It has a large collection of fanfics, including many 'alpha sherlock omega john' ones. The website is well - organized, allowing you to search by tags and filters to easily find the stories you're interested in.
Fanfiction.net is also a great place. There are many talented writers who contribute their works about the Avengers and Sherlock. You can search by tags or use the search bar to look for specific types of stories, like crossovers between the two universes or stories focused on a particular character from either.
You can start by looking on fanfiction websites like Archive of Our Own (AO3). It has a large collection of Sherlock - related fanfictions, with different genres and themes. There are also some dedicated Sherlock fanfiction forums where fans share and discuss their works.
Another place to check is FanFiction.net. There are many Sherlock fanfiction writers there. You might need to do a bit more digging as the site has a vast amount of content, but if you search for 'Sherlock shot' in the Sherlock Holmes category, you should find some relevant stories.