There's a great fanfic titled 'Archie, Betty and the Riverdale Mystery'. This fanfic combines their relationship with a mystery that they have to solve in Riverdale. It's interesting because it not only focuses on their romantic or friendly relationship but also on how they work together to figure things out. Also, 'Betty's Love for Archie' is a simple yet engaging fanfic that just dives deep into Betty's feelings for Archie and how she tries to express them in different situations.
Well, I know a fanfic called 'Sunny Days with Archie and Betty'. In this one, they go on a series of adventures around Riverdale during the summer break. It's really cute as it shows their lighter side and how they bond over simple things like ice - cream and bike rides. Then there's 'Archie and Betty: The Secret Pact' where they make a pact to always be there for each other no matter what. It has some really heart - warming moments.