You can try fanfiction websites like Archive of Our Own (AO3). There are a large number of fanfictions there, and you can search for 'I have always loved you' related ones using the search function. Many writers share their creative works on this platform.
First, think about the characters and the story world. Decide who the characters are in your 'I have always loved you' scenario. Then, outline the plot. It could be a simple love story or something more complex with twists and turns.
The Vampire Diaries fanfiction is appealing because it gives fans the opportunity to continue the story in their own way. The show may have ended, but in fanfiction, the story never has to end. We can see the characters grow and change in ways that the original show might not have explored. It also lets us explore different pairings and relationships. For instance, some fanfictions might focus on a relationship between two side characters that were never given much attention in the show, which can be really interesting to read about.
One great 'The Vampire Diaries' fanfiction is 'The Other Side of the Coin'. It delves deep into the complex relationships between the characters, especially exploring a different side of Damon's character. Another good one is 'A New Beginning' which takes a fresh look at how the story could have evolved if certain events had occurred differently in the original series. And 'Love Beyond Time' is also worth reading as it has an interesting take on time - traveling within the Vampire Diaries universe.
Since I don't have the details of this particular novel, it's hard to say exactly. However, in many novels with a title like this, the main characters are likely to be individuals with distinct personalities. One might be more reserved and the other more outgoing, and their different traits could either bring them closer or create conflict in their relationship.
Another reason for its popularity is that it can fill in the gaps or create alternative scenarios. Fans often like to imagine what could have happened if different relationships were explored in the Harry Potter world. This fanfiction about Harry loving Daphne provides that opportunity. It can also introduce new magical concepts or plot twists that are related to their relationship, making it all the more appealing to readers.
I don't have the exact information about the main characters in this light novel. But typically in a love - centered light novel, there would be the two lovers, probably a male and a female lead.
I'm not sure specifically as I haven't read this light novel in detail. But generally, it might be about a love story, perhaps a journey of unrequited love that finally turns into a fulfilling relationship.