Detox your liver for like 2 weeks taking liver detox tablets and lots and lots of water. exercise helps too. then go and see your doctor for a liver function test. the test can reveal alot about your liver enzymes and its health and ability to process things like a normal liver.
When you drink alcohol its not alcohol itself that makes you feel "drunk" its your bodies response to it, the booze goes into your stomach, liver takes it soon after (first pass metabolism) and says..."OH FUCK POISON, I NEED TO FIX THIS SITUATION" and so mr liver does somthing complicated and realeases enzymes into your blood which give you the feeling of being "drunk".
alcohol sucks.