I don’t think you should get too concerned with how to play mind games.
I’m with you in that I’ve always felt it’s ridiculous to act out of character to try and seem desirable, but it’s basic psychology.
We want what we think we can’t have. We want to feel like we’ve attained something.

I still think this one is a lost cause, but if she does try to speak to you again, don’t be too easy.
If someone is interested in you, they won’t give up easily just because you’re busy.
If a girl likes you, she’ll react how you’re reacting right now.
She’ll wonder why you’re taking long to reply, etc.

But she has led you on more than once, so the next time (if there is one) she arranges something, blow her off – nicely.
Say you’re busy… tending to children in Africa or something equally charming.
Don’t put her, or any other girl, on a pedestal because then you start acting all wimpish and needy.

And, like I said, maybe she’s just not into you.
Maybe she doesn’t see you as her type. Maybe she wants some guy with a hectic schedule.
If you’re anything like I was, when I was single, you have too much free time and want to fill it.
Sounds like she’s the opposite.
Not a good match.

Don’t think too much – Ben’s advice should be taken lightly. You don’t need to think into details. Just play things out how you see fit. Don’t appear to eager. Think what a girl would want in a boyfriend and be that.

Most importantly, put her in the back of your mind and stop waiting around.
Go and seek out somebody new and if she comes chasing, good.
If not, so be it.