Ok so here's the situation I always seem to get into with girls:
Things will start off strong and move fast (without me even trying). I'll basically meet a girl and apply a strong cocky/funny game on her and within a week she'll be completely hooked. She'll be initiating most conversations with me, keeping conversations very flirty and giving me IOI's like a baby gets toys on Christmas. This holds true for the girl I'm currently in this conundrum with. Things started really heating up towards the end of 2nd semester (both in college) and we were talking everyday online and going to parties together an hooking up on weekends. I made sure throughout this time to never reveal too much interest, only reciprocating what she gave me. My mindset was to be the opposite of the "nice guy wuss". I would initiate conversations with her as well, but always kept it around "50-50" her to me.

After school got out we both went home (very far away from each other, online only possible communication). Shortly after she suddenly got cold real fast. Her responses suddenly became short and dry and she showed little interest. She would be online most days but wouldn't start conversations with me. I started a couple with her but they still seemed very "flat". Rather than keep pressing, as I would have done in my AFC days, I backed off completely. "Gave her the gift of missing me". Low and behold, after about a week or so of this mini freeze-out she contacted me again and the flirtyness was back this time. After this convo, I decided I'd wait a few days before initiating a convo with her as to not come across needy, but she immediately IM'd me again the next day and we soon began talking again everyday. Things were great until about a week ago. I would be ending conversations and she would make sure to say things like "talk to you tomorroww!!" This is how our last "good" convo ended a week and a half ago. Things got complicated from here as I went on vacation out of the country on the same day that she came back to the country for summer school. She initiated a Facebook chat convo a week ago that just died out on its own, and I initiated one the next day which was very brief and ended with her never responding to a question I asked (not a key question to this topic). This whole time since being on vacation she has not once been on IM when I have been on and has only been updating FB statuses via iPhone, leading me to believe she hasn't been going online at all. Regardless, I'm still disappointed that she's made absolutely zero effort at all to contact me since I thought things were progressing.

This leads to the purpose of my post. How can I end this "hot and cold" pattern I'm in? This not only happens with her but has happened with past girls as well until I would finally get annoyed and "next" them. I'm prepared to do the same with this girl but would prefer to solve this sticking point rather than keep avoiding it. My new plan is to wait things out and continue to not contact her for at least the duration of my vacation (while also gaming girls as any single guy should.) I'm confident that within the next week or two she will once again initiate a convo with me as the past would dictate, yet I want to change up my approach this time after she does. I want to be able to keep her around without having to go through these annoying lulls. Any advice or analysis of my situation would be greatly appreciated.
Thanks for reading this way longer than intended post.