About a year ago, I wasn't even full red pilled yet when I visited a friend's house for the first time. In there I met his sister who he had complained to me about a few times, she's kinda crazy and spoiled (both them are actually). Five minutes after meeting the girl I started catching clues that she was interested on me, I was trying not to feed it since it was my friend's sister but she kept giving me attention asked me for my number and facebook profile, etc. At a certain point when we got alone I could swear she was expecting me to kiss her, which I didn't. Anyway, after I left she started messaging me and I replied. I was expecting her to lose interest after a while but she didn't, I would take a week to reply to her messages because I wasn't that interested and she would immediately and excitedly reply to my messages. That went on for a while till I set a date, I barely said anything and we just kissed for about one and a half hour, now she keeps messaging me saying she can't wait to meet me again.

My question is, What the hell did I do to trigger it? Besides being crazy there's nothing particularly wrong with her, I have slightly above average looks but I don't think that's enough to justify it all. I want to find out what it is all about in order to do it again with better girls.