Let him know that Asuka wants him to hold her.
Then she has someone to care for her, and he has someone who needs him. It fixes them both.
The boy should get into a couple of bar fights, grow a beard and find something to obsess over.
People that encourage self-actualization without going out of their way to make him feel like shite is a start.
I don't think we need to fix him since him being all whiney is the reason we had a decent story. If he was a generic, ''Imma go fuck those fuckers up,'' kinda guy EVA might've gone into super normie territory.
>implying that he's not already perfect