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.
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.
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.
There are many interesting fanfictions about Vampire John and Sherlock. One common theme could be how Sherlock, with his brilliant deductive skills, discovers John's vampire nature. It might involve a lot of mystery-solving around John's condition and how they navigate their relationship in the face of this new revelation.
The appeal lies in the unique twist it gives to the classic characters. It combines the mystery-solving aspect of the original Sherlock Holmes concept with the allure of the supernatural. Vampire John adds an element of danger and mystery.
In many Sherlock/John fanfictions, their care for a baby can be quite heart - warming. Sometimes it's a case - related situation where they end up taking care of an orphaned baby during an investigation. This often shows a softer side of their characters, especially Sherlock, who might seem initially clueless but gradually grows attached.
One possible fanfiction could be about Sherlock and John investigating a mystery related to a 'carve baby'. Maybe it's a strange art piece or an object with a hidden meaning that they need to decipher.
The 'carve baby' in the fanfiction could be a symbol. It might represent something from Sherlock and John's past, like a case they worked on long ago that had an unresolved element related to a carved baby - like object.
One possible fanfiction could be 'The Unforeseen Danger'. In this story, Sherlock and John are on a case chasing a serial killer. While investigating an abandoned building, they are ambushed. John gets stabbed while trying to protect Sherlock, and Sherlock, in his rage to save John, gets a severe blow to the head. But their strong bond helps them get through the ordeal.