Well, it's possible that Hinata becomes more confident around Naruto after the Pain Invasion. She might be more forward in expressing her emotions, which could lead to Naruto reciprocating her feelings. Maybe they go on adventures together in the village, helping people out and in the process, their bond grows stronger. They could also have some really deep conversations about their pasts, their dreams, and how they see the future of the village, which further cements their relationship.