Well, it's possible that Mang gets back together. But we need to know more details about the situation, like the reason for the initial split and the efforts made by both parties since then.
Sure does. The Shield Hero slowly gains respect over time as he faces various challenges and proves his worth. His character development leads to others recognizing and respecting him.
Well, in certain fanfiction stories, Naruto realizes that he has to depend solely on his inner strength. So, he delves deep into his own chakra reserves and tries to understand and control it better. He could also study old scrolls by himself, learning forgotten techniques and using his own determination and willpower to adapt them to his fighting style, which gradually makes him stronger on his own.