Firstly, I completely agree - it's completely up to you as to how much or indeed whether you drink - stick to your guns, you don't have to drink to have a good time! Secondly, as a matter of interest, it's often not the alcohol itself that causes reactions, but what your body turns it into. Alcohol is turned into several chemicals when it's processed by the liver - for instance, aldehyde, which triggers asthma in some people. It's not a true allergy as such, but definitely an adverse reaction, and a fair amount of research has been published in medical journals. Thankfully I don't react as badly as you do - my nose blocks up and I start wheezing, but it's still not pleasant.