It always happens eventually for one reason or another.

That girl you used to talk to heavily, and when you try talking to her again after some time, she's just not as attracted, or care as much as before. I've seen this many times before.

I think it has something to do with the girl not believing it's going to lead anywhere, or a "been there, done that" sort of thing. It's a lot more difficult than the first time around, but I'm not one to turn down a challange. Thoughts? How do you revive that attraction?

nice question,

first of all, ur nickname "logic" is cool, but let me tell u smthn that might change ur perception of few stuff,
Logic is what WE guys understand, women do not understand logic !
you can't convince a girl logically to sleep with her, you can't convince a girl logically to date her. this doesn't work, their brains are wired in a way that logic doesn't win over emotions.

They are emotional beings that stick to emotions over logic.

Second of all, concerning your question, allow me to explain it by giving you an example:

Lets say your having sex with a hot chick, and she's so turned on,
u stop for a certain reason, (lets say phone or what ever), when you come back to continue sex with her, she won't be as horny, but YOU WILL BE !

you will have to go her horniness ladder all over again, while you can take off from wherever u where !

so thats the same hint with attraction,
when you build smthn, we guys hold on to it, and its like i can continue that whenever, but a chick goes through god knows how many emotional states in 24 hours !!! so u can't just get things back at the track right away. you have to start all over again.

Cheers bro