Is it impossible for me to get drunk?

I am 5'9" 175 pound white male. I will turn 23 in 3 months but I have never been drunk. Everytime I drink I get sick before I am drunk. I have tried beer, malt liquors, and hard liquors. I love drinking rum or bourbon but after about the 5th shot or so I feel sick and around the 7th I throw up. I have... show more I am 5'9" 175 pound white male. I will turn 23 in 3 months but I have never been drunk. Everytime I drink I get sick before I am drunk. I have tried beer, malt liquors, and hard liquors. I love drinking rum or bourbon but after about the 5th shot or so I feel sick and around the 7th I throw up. I have tried drinking slow, fast. Drinking on a full stomach, empty stomach and everything in between. Even mixed drinks make me sick before i am drunk. Help?
Update: Before and after I throw up I am not impaired. I still walk, talk and think straight.
Update 2: EDIT: if I drink a gallon of milk I throw up, that does not mean I am drunk. When I drink I do not become impaired. I throw up before the alcohol has time to effect my mind. Please stop replying if you have never drank alcohol.
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