Let me try explain this based on my perspective. I've gone through the same situation, so I feel I might be of some help to you. The "rules" of the game aren't terribly complicated, at least not when compared to physics, finance, genetics, or whatever your field of study may be. The "rules" existed long before humans could make words to describe them. Think of all those losers, the criminals, the druggies, deadbeats who chicks are dropping their panties for right now. All across the planet, this is happening as you read these words. Sucks doesn't it? These people probably aren't smart, they aren't the type of upstanding citizen we'd aspire to be, yet there they are, pounding away at the girls I used to fall in love with in high school. Why is this happening? Do they have some secret mastery of techniques gleamed from the darkest reaches of the internet? Nope. I think what you are experiencing is the difference between internal, nature confidence and the conscious effort to win her over. I play drums, the full set, and it's a big kit at that. Trust me, if I had to mentally keep track of all the rhythms going on simultaneously, I don't think I could play half as well as I can if I go by feel. "Feel" is a powerful tool, and you need to learn that "alpha feel." Internalize it, become it. You're a King, a ruler of your mind, so put it in its place. Even in martial arts, if you try to think about everything your doing, you're doing it wrong. They train to have your body react without thinking (in my experience.)
For me, I made every mistake growing up when it came to women, multiple time. I was so damn AFC, other AFCs would probably have called me a pvssy. I began to study all this SS stuff, the DJ bible, every sticky, and got a little better with women. I had some success, and I was encouraged to do more. However, things got out of hand. I hit all sorts of problems when I began to overanalyze things. Suddenly, I didn't trust my instincts, and let my analytical side take the wheel. Interactions with chicks became calculating chess matches, and I'd be visibly uncomfortable when forcing myself into interactions with girls I was attracted to. I could even tell they were becoming uncomfortable as I tried to set-up good things to say, trying to have that perfect body language, etc. The more I read up on techniques and visited sites like this, the more my success backpedalled. In a way, it was becoming similar to my AFC days, but with the added burden of knowing what needed to be done, yet failing.
One day I just said f*** it, I'm done. I spent a year avoiding the whole girl thing, and focused on myself. I lifted heavy as I could, I travelled and met interesting people. I meditated a lot when my roommate (at Uni) wasn't around. I simply worked on myself, for myself, and said to hell with the game. I got stronger, feared other men less, grew more worldly, and developed a keen focus. I pursued all sorts of hobbies, and simply enjoyed life. People could tell I was happy, and I could tell others felt comfortable around me. I started to feel a real connection to my surroundings, no matter where I was. I felt in control of myself, and felt miles away from the uncertainty of yesteryear.
Then it started to happen. Kind of like waiting for the sun to rise and it finally appears on the horizon. It seemed like all of a sudden other guys befriended me easier, and girls didn't mind my company. I thought little of it, still focusing on staying happy, clearing my mind, and maintaining an "intense calmness" about me. The more time I "trained mind body and spirit" the girls started getting easier to attract. It hit me one day when I heard from a friend a group of girls had deemed me "the cool one." I laughed and carried on as normal. I think what happened is the principles of this site, and others, stayed with me, but became effortless. Remember, a lot of the skills and techniques are derived from alphas male behavior. Alpha males don't wait to call a girl back for a few days because of a thread on an internet forum said so. They do it because they are busy working, meeting other chicks, or out doing whatever the hell they please. They don't monitor their body language, calculate what to say, or any of that crap. They do it all naturally, because it's part of who they are.
For guys like us, we need to learn from them, but it has to become effortless. If it feels forced, people will notice. From Wiki: Sprezzatura (Italian pronunciation: [sprettsaˈtura]) is an Italian word originating from Baldassare Castiglione's The Book of the Courtier, where it is defined by the author as "a certain nonchalance, so as to conceal all art and make whatever one does or says appear to be without effort and almost without any thought about it" You need to go even one step beyond this, and actually do this stuff without even thinking because it's the true you.
Until it comes naturally, don't stop practicing. Try to remove the mind, and get that "feel" down.
Think about every success you've ever had, and how great it felt. Focus on that feeling, and internalize it. That's the true you. The shy, unsuccessful man isn't you. You're deceiving yourself if you think you can't do it, you really are a King. Your brain is a computer that drives your body. With practice and feeling, you can become a true DJ. Every word, every subtle mannerism can be done by you, just as it's done by the greats. The only difference is they've learned it, or were born with it. You can do it too. I never thought I'd play the drums are well as I do today. You are capable of anything....tell yourself this. Say to yourself right now "I'm the goddamn King, and success is my birthright! This amnesia, this hesitation that clouds my mind isn't me. I know I'm the prize, I know I'm the confident man I was born to be. I am not defined by my failures, I'm defined by my determination."
You need to truly believe this. Don't worry too much about the nit-picky stuff, and don't make women the focus. I find they can always tell if all your efforts seem geared towards attracting women. Breathe deeper than you are doing so. Good....now deeper still. Relax and focus on that feeling of success you've had, whatever it may be. That's you....the winner, the champion.
Now, in regards to the girl who is texting you, that's interesting. I still remember the girl(s) who had me first clicking around on this site. This is my opinion, but honestly, I'd avoid her. If you aren't as far along in your journey as you'd like to be, I'd worry she will throw you off. I'm not a huge fan of interacting with girls from the past, if I haven't had success with them. She may remind you of past failures, and you need to be focused on future success. That's just my take. Trust your guts on this one.