Alcohol makes me crazy!

I mean sometimes or like most of the time I can just go to a bar with a friend or something and have 1 or 2 drinks and just maybe feel a bit more relaxed and then I will just open up more and maybe my mood will boost and nothing is a problem. However sometimes when I go clubbing as it’s so awkward and uncomfortable for me to go sober( I don’t really wanna go but my friends all do) and well I will drink loads as I feel so self conscious and awkward dancing and can’t full enjoy myself sober. Anyway I will drink like 8 Vod cokes and be so like stupid I will walk into stuff, dance on tables, tell people the truth to an extent and act all stupid but inside during that period I feel like I’m having the time of my life and can do anything. Then I mean I have literally had sex with my guy friend because I was so drunk, never would have sober but alcohol gave me the confidence of like why not and everything is funny to me. Day after I feel still drunk and I’ve had so much and it starts to wear off after say 48 hours and I feel like so depressed and ashamed. It’s like I have a manic episode or something? How do others not get like this?