The below article (written by a woman) is a textbook case of RP theory "light-switch effect". That is, a woman can go from head over heels for you to utterly disinterested (or even repulsed) in the blink of an eye and for no significant reason.

https://www.refinery29.com/en-us/the-ick-sudden-repulsion-syndrome-meaning

TL/DR: This woman is seeing a guy she's 'obsessed' with and one day he shaves his beard a few millimeters too high above his jaw-line. Suddenly, she's lost all attraction to him and actually finds him utterly repulsive. This persists even after his beard grows back in.

Takeaways:

  1. Maintain absolute frame at all times. This is especially true for a girl you've just started seeing. In this stage, you are still a fantasy in her mind. Any crack in your demeanor can shatter the illusion instantly and irreparably.

  2. If the light-switch effect DOES happen, forget it and move on. This girl permanently lost attraction due to a few millimeters of temporary beard growth. Be aware this can happen for any absurd reason, and sometimes it's out of your control. In the article, the girl actually admits her reaction was totally irrational but she can't do anything about it. The light-switch effect probably calls for a 'hard next' in most cases, so do it as soon as you become aware it has happened. Best case, she second guesses herself due to your display of high value and chases. Worst case, you ditch some crazy chick who no longer wanted to fuck you anyway.

Hope this served as a helpful reminder. Stay vigilant