Your experiences sound quite extreme to be honest, and I can only assume it is due to your own lack of responsibility. I don't mean to blame, but obviously if you aren't responsible and you abuse your body, then obviously bad things will happen. Likewise, if you take it slow and look after yourself (cause in the end, no one else will), you should be fine.
I drink occasionally at social gatherings, and I'm always responsible as well, only ever taking a few drinks throughout the evening, never getting myself plastered for the sake of a "good night" (though I sorta plan to on my 18th, cause I can 8D).
thethethethe, who said it's something that you're gonna have to "eventually" do? I don't think people actually care whether or not you drink, and if they do, well that's just immature.