Rain, you seem to have a pretty decent sense of what to do. But i'm gonna tell you something, and you're going to think i'm crazy, but i'll tell it to you anyway: work on another target at the same time.
This will help you with your main target. Not only does it prevent you from the I-better-not-lose-this-girl-she's-too-important mindset (and thus making you more easygoing and attractive to that girl overall), but it also helps you with your game because you're practicing on another girl. Hey, you might even like the other girl better.
Deangelo stresses the importance of having many potential targets... and it gives you a powerful and attractive image as an alpha male. Having many options is in fact one of the main advantages of any of the PUA methods on here, so make sure you capitalize on that. I use this mindset to keep my options open so I don't become clingy on my girlfriend... and she loves me for it

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As long as you are doing this you will automatically be pretty confident when talking to just about anyone. What you say only matters a little bit. I would advise saying the "when are you going to have the guts to come talk to me?", but say it confidently and playfully while giving the impression that you are indifferent to her response. Then engage in casual conversation to build comfort. When you are alone with her or if enough comfort is established you can move into seduction.