This is how it works, cause sounds like you don't know this. When she is obsessed how you described originally, you hold the cards, but once she comes out of this stage, it's over, you fucked up, face it. While you have the cards the more you seem like "oh well" or "I'll see you later" or basically show little interest then her obsession grows. You have to keep your distance, keep your conversations short and avoid any compliments towards her and most importantly never tell them you love them until she has told you that 2000 times, In other words "too much circulation makes the price go down"
Think of it this way, a mountain climber is always looking for a new mountain to climb, once a mountain has been climbed the thrill is gone to climb the same mountain again and unfortunately in this case you are the mountain, she conquered you, you are no longer of interest, you fucked up, what you described above is the opposite of what you should have done. Never chase someone like a sucker, they will say "SEE YA". avoid them (assuming they have interest in you) and they will beg for you.
Remember in a relationship it's not you against her, it's you against yourself, self-control is key. Man did you not see "the ugly truth" geeeeeeeez. 
I never understood this reasoning. I mean, when does it end? Or do you just act disinterested your whole life, until you get married, and then another 40 years of disinterest? And if you slip once it's divorce?
Seems to me this kind of advice is just another recipe for people trying to force relationships that were never meant to be... like 99% of all advice given by pickup artists, players, random "bros," etc. on the subject. it's like an eternal story: "how to get the girl you don't deserve: tips and tricks" resold countless times, over countless generations.
for as much ridicule as uberman receives, i find myself nauseated FAR less by his advice... what's wrong with just going out, meeting people, and when you find someone who is right for you it's obvious? -- mutual attraction, less "mind games," not feeling like you're in some kind of warzone all of the time. and if you can't accept that, if you aren't attracted to the kind of girls who are attracted to you, then
try to improve yourself. become more educated, wealthy, powerful, etc. until you can get the girl you want, and if you fail, settle or stay single.
