Getting into fights, doing stupid shit, disrespecting girls, disrespecting friends, basically turning into an asshole that has no social skills, when I get black out drunk.

Is this something I can fix. I don't plan on getting black out, but if it happens I don't want to revert to the unsuave guy that I used to be not to long ago. Is this a part of my personality?

Apart from not drinking so much, is there something I can do? I have worked very hard to change myself and recently took a major step back when I did a bunch of stupid stuff to my close friends and disrespected them. My confidence is blown, I dont want to go out anymore. I don't really care about much anymore.

Is there a way to change what your underlying ways were?

Haha mate! i can be the same sometimes. i wouldnt say disrespectful but sometimes a bit too open. when im out i dance like a retard because i know i cant dance good and talk to everyone, just be really outgoing and people like that. but sometimes people dont like when your too outgoing.
I suppose just dont get too drunk, or you could always convert that confidence into good. Try and maintain a mindset of how to pick up and all the routines you wanna run through, but you can use your confidence/ drunkiness to your advantage by doing so.
Not really sure if this answers your question, but maybe just try hold back on the beers when your out if your aim is to game. otherwise just write yourself off and have fun with the boys.

stop drinking perhaps?

like what advertisements say.. drink moderately

yeah just stop fecking drinking excessively. Alcohol isnt an excuse to act like an asshole.