Ok I'm quite new here and am looking for advice on how to become less beta, I know I have some niceguy traits and now am trying to shake them, am 16 btw, Last week I asked a girl on a date, which was this Friday. Went to a restaurant, was reasonably funny, confident, retained strong eye contact etc. Only lasted an hour and a bit because I met with a lot of my friends to go to watch a band while she went home. The next day, she was at a party that I was not invited to and got with 1 or 2 guys, I arrived later on and she was crying about it etc. I told her that we should stay friends in response (in retrospect perhaps I should have been more harsh) and she messaged me a couple times saying how sorry she was(I said something along the lines of don't worry I'm not bothered, but pandered to her slightly asking if she was alright). I'm not too knowledged on TRP atm, so could somebody help me to improve myself based on this? don't give it to me softly just rip into me constructively.

I'm a reasonably popular 7-8.5/10, play rugby, lots of friends and go to a lot of parties, but need help improving my game