Hi guys I am just trying to figure out what mistakes i made with a particular girl, when trying to get her to be my fuckbuddy

So i knew her for 4 years(she was 15 when i met her i was 18) through occasional chats at the gym. i never showed any neediness but we always had nice talks. Fast forward we started seeing each other more regularly at the gym, started talking more and swpaped numbers. After a while we decided to go out clubbign together with some of our friends. altough she brought none, which was odd because she is a partygirl with partygirl friends So we hooked up that night, everythign was alright. she was the one to text me the next morning, and everything was going as planned. about 2 weeks later she tried to call me like at 5 in the morning after she was out partying, but i was sleeping. 1 week after that we met at a bat and had toilet sex(for some reason she doesnt really like to sleep at dudes places, probably cause she still lives with her parents). the next mornign she was the first to text again. After that i tried to get her to come to my place every once in a while (once a week) which she always refused. Fast Forward 3 months later, when ever i happen to run into her at the gym or at a club, there is not really any interest from her., she also doesnt text me anymore (me neither) and there is no sexual tension coming from her (i just try not to show mine haha)

as far as texting game. i never really texted a lot with her. she would always send me snaps or reply to my snapchat storys immediatly, while i always waited for a while, but after the second hook up and the failed booty calls. nothing. i never wrote more then 3 lines to try to convince her. i actually just always asked her "if she wanted to check out my new place"

worth mentioning. i had issues with whiskey dick both times, she is a really good looking party girl going out 3 times a week and a thing for black guys and oriental guys ( i am the second)

so my question is, what i could have done better to get to my goal to get her to be a fuckbuddy

thanks in advance :)