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I know exactly what you mean.
I was recently at a party with a chick exactly like that.
Initially I had a hard time telling if she was into me because she was flirting with all of the guys. Eventually, after I throughly busted her balls (ex: we were dancing she told me I'm a good dancer I reply "you're alright.") she would stick around with me for slightly longer than the other guys.
I didn't actually take it anywhere because I was just trying to have a good time with my friends, but in my situation and in yours the proper move would be to isolate and escalate.
You hit the nail on the head, but then gave the wrong advice (?)
She stuck around with you after you BUSTED HER BALLS. i.e. you stopped being the guy that gives her attention, seeks rapport, does what she says and is nice to her in the hopes you'll get laid. You were a bit of a challenge, and then she started to get interested and she might have started chasing you.
To the OP, she was attracted to you. You didn't make a move. Now, a low self-esteem girl will rationalise this as "I guess I'm not hot enough for him...boo hoo" but a social, fun girl with friends and high self-esteem will say "he's a pussy." But, you're still a nice guy and sorta fun to hang out with, so she'll shoot you a text occasionally when there's nothing better going on or the guy she's fucking is away or whatever. You reply immediately of course, and offer her plans and make things happen. When you see her, you try and build more rapport and keep her happy. If you want to be friends with her, then great, you're doing well.
If you want to FUCK her, however, then you have to NOT respond to her for a while, make her miss you a little and wonder what's up, and then see her after a while, in the company of other women who are flirting with you, don't give her too much attention, tease her a little, and then watch as she gives you more and more IOIs and chases you. THEN you just have to be man enough to sexually escalate using push-pull, and you can close.
TRY IT!