Not Getting High Of Weed?

So i was overseas with friends and we decided to smoke weed, it was my first time and it was at a party where idd been drinking and gottern to the "spinning" or "tipsy" faze so i wasnt drunk. Which is when we decided to go for a walk and smoke it. The joint got passed around and i got about 4 drags. We then went back to the party and all my mates were baked as **** and had the blood red eyes and ****, and i was fine, my eyes didnt have a hint of redness and the only thing i felt was things were slower abit but im not sure if that was the weed or alcohol. After 3hrs i went for another walk with another group from the party to try again and this time whenever i took a drag i held it in for as long as it could (before i only held it in for like 2seconds) i got 5 drags this time and again nothing happend? But everyone else was once again high as a plane and im there not feeling anything from the weed.

Does anyone have any explinations? i know my technique wasnt right the first time since i didnt hold it in for long enough but the 2nd time around it had to be right. And yes i was breathing it in completely and not doing a bum puff. (And no one remind me the consequences or tell me drugs are bad im old enough to make my own decisions and youre not my mother.) Can someone help me figure this out? thank you :) Am i immune to the effects of weed? or anyone else have simmilar stories?