They are currently friends. Cyd had a crush on Naldo in fourth grade and it's possible that she still has feelings for him. At the homecoming dance, it is revealed that they both have feelings for each other.

Who is Daisy's best friend?

Jordan Baker

Daisy's friend, a woman with whom Nick becomes romantically involved during the course of the novel. A competitive golfer, Jordan represents one of the “new women” of the 1920s—cynical, boyish, and self-centered.

Can Barry and Naldo time travel?

A Time To Cheat

Throughout the episode, Naldo helps Barry create time travel. Barry and Naldo hug while zapping themselves with Barry's laser the same way as Cyd and Shelby.