Both in the manga and anime Hinata she gives details on why he loves Naruto.

Hinata says that she's being selfish.

However, when she means selfish it was to the point that she didn't want Naruto captured.

She says that Naruto motivated her on not wanting to quit becoming a shinobi when she wanted to give up and that's why she loves him.

Honestly, I prefer the anime of the fight rather than the manga. In the manga she was quickly defeated as opposed to the anime where she held her own and gives better details on how much Hinata does love Naruto.

Here's the YouTube video of where Hinata's interference in the anime and if anyone wants to know the manga chapter it's 437 and if anyone wants to know what chapter is Naruto's battle it's 430.