I followed TRP for quite a while now and I can only nod my head over the most basic & obvious stuff people don't seem to get via intuition. But then again I start to recognize myself over stuff that recently clicked in my head as well and the thread comes up, like this one.
Anyways the text below is showing a development of mine, which is encouraged by many TRP redditors, but I'm not sure if I'm doing it right. It seems like I lost control over who I am. It's more of a long run TRP thing - I don't want to end up without a girl and I need insight whether or not I'm doing it right or if I need to change my game. Reason why I'm writing it is this

Since college, my mindset turned 180° and I'm not sure if I like it.
I never had an issue being a funny and "cool" kid, but back in high school I would mainly focus my energy on learning new stuff, especially from the internet e.g. programming or learning a new language. I hung out with friends every day or two, but in a common sense for a couple of hours.

Since I started college my mindset has shifted and all I can currently think about is my looks and being cool, which leads to me being a smug douche. I am mainly concerned about what clothes I wear, that I lift regularly and how many people I can connect with. This even led to the point of me joining a fraternity, because that way you meet new people on a daily basis. Where I found myself sitting at home, reading up on stuff and studying, I am now socializing 24/7, spending nights out during the week and say "fuck my liabilities", I will somehow make it - everything will be fine. All of that, because I don't want to miss out on my young life and drift by as many girls as possible.
See I'm 5'4, but having a father who runs his own well-established business, I became relatively arrogant trying to make myself untouchable that way. I am considered an alpha character wise and people usually shut up when I talk or make calls when there are girls around they're trying to impress.
I am spending money I don't have as a college student, to buy shit I don't need, to impress people I don't like. All of that for looking prestigious and attractive to girls. Not only did I preorder the new boosted board, but I also went on multiple festivals (e.g. UMF Miami, Korea, …), had countless road trips (Amsterdam, Paris, St Sebastian, Rome) and club lounges. I'm currently in Singapore and jet around all Asia during holidays - alone. It's not even like I'm posting that shit on social media to brag on a long run… I just feel like I'm drifting off my old character and start becoming that whack person I always hated.

All of that sounds like I'm internally insecure – I'm not a fool, I thought about that as well and maybe I am. All I can say is that I'm generally good at seducing a girl quite easily, once I talk to her, it's just intuition. But I'm usually not approaching girls in clubs – on the street or college; no issue whatsoever.
70% girls fall out of the raster for being too tall anyways and the others either don't meet my standards (visually or mostly intellectually) or I get sick of the games and decide to rather continue living my young life. But you know what they say - 30 is the new 40 in the current generation.
Last girl I had was 4 days ago – I know I could easily hang out with her more often and get more sex, but I'm just bored of her already. It just isn't my style to collect girls and yet I do it.

Why I'm concerned is, because I start becoming a failure. I had the worst grades this semester in my entire educational history (B- grades), adapted language which I always frowned upon as a teenager and I feel like becoming a whack character in general. What if I, because of all that, ultimately lose at life and end up having a shit job and no good girl at my side?
I am 22 now and aware of all that. I even asked my friends multiple times for my strengths and weaknesses (judging, disrespectful, arrogant) but even though knowing them, it doesn't seem like I'm able to change my mindset.
tl;dr: I'm 22y/o and I persuade myself that I should live life to its fullest, while spending lots of money and actually not achieving anything anymore. I am afraid of ending up as a loser, who was an asshole and ends up with no girl.