That's binge drinking. I did it all through my teens and 20's and escalated to daily drinking by my 30's. I never knew why I would end up with a huge hangover that lasted for days when I never intended to get drunk, just have a few drinks with friends. I was absolutely unable to control my drinking once I started. I'd drink till I passed out. Then I'd swear off until I forgot about the hangover. And the cycle would start again. It's definitely smart to look at this habit now. Your drinking will increase, not decrease, if you don't put on the brakes now. You lose nothing by not drinking and if you keep drinking you'll potentially lose everything.