@alicedewrites No, Percy is actually her first crush! I think Percy is an unnecessarily hated character, even though he got his redemption arc ... Ally, who's heavy into bespectacled dorks, would definitely be fond of the serious, older boy next door, who refers to the plants in her garden only by their scientific names and is always ready to have a tea party with her (can you tell I love making up stories of baby Ally and the Weasleys?)
It's a childhood crush and nothing more, because he has only ever seen her as a sister :)