I am guessing you are less than 30 years old? give it 5-10 years and it'll be much more painful after a heavy night of drinking. sugar and alcohol are both metabolized by the liver, and large amounts of both/either will make you feel poorly. age and frequent use of alcohol and junk food will just wear your body out sooner. the feeling of being drunk is most noticeable when your blood alcohol content is rising, aka when you drink quickly on an empty stomach. but you can have a nice buzz going all day with proper planning and eating beforehand.

I realize after typing this out it sounds a bit preachy, but take it as a caution from someone who felt invincible in their 20s