Why does she never initiate the conversation?

Well, at the time, since she didn't want to text you later, I don't think she likes you. You can continue to talk to her and try to get her to like you. And please don't rely on that just because you are "popular" doesn't mean she's going to like you and treat you nicely. If you want her to text you later next time be like "Text me later...if you want?" Never give her orders. Good luck.