My tolerance is annoying

I (25M) never put any thought into the amount of alcohol that I can drink, until my friend and girlfriend pointed it out to me last weekend, stating that I have a “high tolerance”. They had told me that I can hold my liquor better than most, so I decided to put it to the test. Last night at 11pm I got some friends together for my “blackoutathon”, a crude term just to see how much I can drink before passing out/ puking/ or blacking out, I haven’t gone to sleep yet and so far I have had 1 liter of rum, 6 (8%) ciders, 1 long island, and I’m drinking a Stella as I type this, I don’t really feel anything. This feels silly to type out, I imagine that I sound like a kid bragging about his first time drinking beer haha, but is there something that could cause this tolerance level? Genes? I am Irish, not sure if that has anything to do with it, but my dad could drink me under the table. I also drink once or twice a week, so I haven’t been able to “build” up anything, just a natural occurrence I guess. Thoughts?