My first time drinking?

the first time i got drunk i had 2 cups maby 3 of captain and cola mixed 50 50. I had 5 shots of captain. And i had two beers. But i never got a hangover and in the morning i was a little tipsy but i was fine. iv drank a few times after that to and i still havent vomited or felt like crap in the morning. Am i just lucky or am i not getting drunk enough?