1) Cedric Diggory: Cho and Cedric had a romantic relationship while they were both at Hogwarts School of Witchcraft and Wizardry. He represented Hufflepuff house as a champion in the Triwizard Tournament, with Cho supporting him. Their relationship lasted for some time, but it ended when Cedric was tragically killed during a task in the tournament.
2) Harry Potter: After Cedric's death, Cho developed feelings for Harry Potter. In the fifth book, "Harry Potter and the Order of the Phoenix," Harry and Cho started dating. Their relationship was initially filled with joy, but it later became strained due to various circumstances, including Cho's grief over Cedric's death and Harry's responsibilities as "The Chosen One." They eventually decided to break up.