Six months later, Tidus has become a blitzball star in Spira despite being weaker than he used to be.Chuami and Kurgum are being sent to Besaid by Baralai, leader of the Spira Council, to meet with Yuna and they meet Tidus on the Bevelle Stadium Road. Chuami notices he's injured and has little energy, although he is trying to hide it. Chuami and Kurgum return to Bevelle with Yuna, who rushes to meet with Tidus. Yuna had previously told Chuami that Tidus is her boyfriend, but when Chuami and Kurgum eavesdrop on the conversation between the two, it seems they are breaking up. Yuna is jealous of Tidus's friend Marphie, but soon tells him she doesn't care anymore, and has already got another person she likes. Tidus asks who it is but Yuna tells him it's someone he doesn't know and leaves.
Chuami and Kurgum part ways with the latter accompanying Yuna and Wakka, and the former returning to Besaid with Tidus. When Tidus asks Lulu about Yuna's new love interest, Lulu says she thought Tidus would know Yuna better and tells him to find out himself. She says that if something else can be brought back, then Sin's revival shouldn't be surprising. After Tidus figures out the meaning behind Lulu's words, they depart. On a ship with Lulu and Chuami, Tidus says he wants to follow Yuna and the others on her new journey, since he promised to be with her forever.
http://finalfantasy.wikia.com/wiki/Tidus