You can find 'Beast Boy loves Raven' fanfiction on fanfiction.net. It has a large collection of Teen Titans - related fanfictions, including many focused on this pairing. Just use the search bar and type in relevant keywords like 'Beast Boy loves Raven' and you'll get a list of stories.
There's also 'The Hidden Love'. In this fanfiction, Raven has always had a secret love for Beast Boy but is afraid to show it because of her own emotional barriers. It shows how they both struggle with their feelings and the challenges they face in expressing them.
You can try Archive of Our Own (AO3). It has a large collection of fanfiction, and you're likely to find many 'raven loves beast boy' stories there. Just use the search bar and type in relevant keywords.
There's also 'The Unspoken Bond'. In this fanfiction, their relationship develops in the midst of fighting against a common enemy. It shows how they rely on each other and how their feelings start to shift from just friendship to something more romantic. The action scenes combined with the budding romance make it a great read.
It's mainly about the relationship between Beast Boy and Raven in a graphic novel form. It might explore their unique bond, their adventures together, and how their personalities interact.
One common theme is the exploration of their different personalities. Raven is often depicted as more reserved and serious, while Beast Boy is fun - loving and carefree. Their relationship development in these fanfics usually involves them learning to understand and accept each other's differences.
A fanfiction could also focus on their relationships outside of being superheroes. They could be having a normal day at the Tower, just hanging out. Starfire could be trying to cook something new from her home planet, Raven could be reading a book in the corner, and Beast Boy could be cracking jokes, which at first annoys Raven but then she starts to laugh.
You can try some popular fanfic websites like Archive of Our Own (AO3). There are a large number of Teen Titans related fanfics, including ones about Raven loving Beast Boy. Just use the search function and type in relevant keywords.
Raven and Beast Boy's relationship status varies in the comics. Sometimes they have a romantic connection, but it's not a constant throughout all comic runs.