He thought this was over for sure once Roland spoke up, but no. That face on Inigo is either completely genuine or ready to keep up this act. His own put-on expression about ready to slip, Tidus manages to work it back into something longing. Even... puppy-eyed?

"You...don't want me to go...do you?"

He twists his outstretched hand, opening up the palm. Bro... your ticket here, thank you very much.