Well, there's a fanfiction called 'Annabeth's Hidden Heart'. It delves deep into how Annabeth's crush on Percy affects her actions and decisions. It has some really sweet moments where she tries to hide her feelings but fails miserably. Also, 'Percy and Annabeth's Unseen Romance' is quite good. It starts with Annabeth realizing her crush and then follows her journey as she tries to get closer to Percy without being too obvious.
There are several 'annabeth crushes on percy fanfiction' out there. One that stands out is 'Love in the Making'. This story not only focuses on Annabeth's crush but also on Percy's obliviousness to it at first. As the story progresses, you can see how their relationship develops because of Annabeth's unspoken feelings. It has a great plot that includes their adventures together and how her crush plays a role in those adventures. There's also 'Annabeth's Secret Love' which is more about Annabeth's internal monologues regarding her crush on Percy and how she views Percy in different situations, which makes for an interesting read.
One popular 'annabeth crushes on percy fanfiction' is 'The Unspoken Feelings'. In this story, it beautifully depicts Annabeth's internal struggle with her growing feelings for Percy. Another great one could be 'Crush in Camp Half - Blood' which shows their interactions in the camp setting while Annabeth is dealing with her crush.