Give you an example if why you have no idea what you're saying... You say Hinata stopped crying for Neji, yet what did you expect? She was crying her eyes out, and shaking, yet she had to pull herself together so she could counsel Naruto. You can even see it in her expression, she's biting her lips, trying to hold back her tears. you also don't seem to mind the fact that lee stopped crying too after , the fact that Naruto barely shed a tear, or the fact that tenten, gai and hiashi didn't cry at all.
And about her comment on Naruto's hand, she was scared, her cousing just died in front of her and she's facing some crazy monster, Naruto makes her feel safe in this time of despair she is in. There's nothing wrong with her feeling comfortbecausr of holding his hand
As for what she's done that's useful
>boosts Naruto's confidence
>saves him from pain (I really don't care what you have to say about this, since Naruto himself considered this her saving him in 559)
>helps him get over neji's death
>protects Neji from a Zetsu
>saves Naruto, Kakashi, bee, and gai along with Ino
>fixes Naruto's shoulder, allowing him to attack obito
> fights off the juubi to allow Naruto to give chakra to the others
>helped fight off juubi clones
>fought two days straight against the zetsus