Don't think she's heir anymore, her sister Hanabi is probably heir now since the dad and leader of the clan can choose who is the heir. He didn't care if Hinata life was put in danger and said its a shame Hanabi who is 5 years old is better than Hinata who was 12 at the time
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. She was even on a mission with her dad during the Pein arc so he favors her over Hinata, she's about 9 years old right now as well. Also she only became strong by watching Naruto so if no Naruto then she would still be the shy stalker girl she was in part 1 and first halve of Shippuden, if she likes you then she wouldn't really talk to you as she talked to Naruto 6 times and she loves him so unless you go for her, you'll know nothing about her as Naruto knows about her from other people such as Kakashi, Lee, and Neji.