I’m 21 and worried about my alcohol habits.

Alcoholism runs in my family. My dad drinks every night, about 6-8 beers and I can feel the genetics catching up with me. Since I turned 21 last October (and I also went through a bad break up) I have been on and off heavily drinking. I can drink a pint of vodka a night by myself and use it to unwind and sleep. I have never been one to day drink, and only need it for unwinding. I have found it affecting my relationships with people; I need to drink while out in social settings and have had conversations with my father who struggles with the same issues. He tells me it is a part of being a 21 year old, and to enjoy drinking while not getting hung over- (which I never get hang over, besides a headache) -and that this is the time I would be partying at college, if I ever went to college. I have definitely taken brakes from drinking; whether it be emotionally or I have been sick, but sometimes it isn’t that easy. I worry sometimes I will never be able to be sober at night to sleep or at social events at night time, but the few people I have talked to that are my age have told me that this is just a phase and as we get older it will slowly go away. I have done a lot of embarrassing things while drinking, and made bad impressions in front of friends and colleagues while drinking, only at night. My question is, is this just a phase that I need to go through as a 21 year old-soon to be 22 year old- or is this something I shoulder worry about?