Why is my relationship with alcohol so unusual?

I get drunk pretty fast (after like 5 shots or beer) and I throw up easy on shots but I build up tolerance if I drink too frequently. But after controlled drinking for hours assuming I don’t throw up I don’t get more drunk even past 10+ shots and able to function as I like to call it “lock in mode”. And I have no addiction towards alcohol and I never take shots by myself and able to go cold turkey or just infrequent beer drinking, never understand how people become alcoholic. The only time I am a “alcoholic” is when I’m traveling and I’m going to bars and club every night.