Difficult one. So if she suddenly acted different from one day to the other there might've been an information gained. And from the way you described it she's unsure what to do about this. She might've realised you like her that way or she might've found feelings for you and doesn't quite know how to handle this information. She likes you as a friend but might be unsure about her sexuality or she likes you as a friend and is unsure what to do about your crush.
Honestly I don't feel qualified to give advice on the matter but do you know if she even is sapphic?