alcohol doesnt really effect me

Im 22f and around 115 lbs. I do not drink often (maybe 4-5 times in my life) and each time I havent been effected at all. Even on my 21st, I had three mixed drinks with my friend who is a heavy drinker (we both had the exact same thing) and he felt the full effect I didnt get anything other than a headache the next day. Is it just different person to person? I had just assumed as a relatively light weight female who has never drank much it would have a much stronger effect on me. I partake in 🍃🍃 and usually about a 10mg edible is enough for me.