I'm not an alcoholic, I'm a college student

I do not even know where to begin. It is not fair for parents to think its okay to pass of their problems on their children. It is not enough that I have to write paper after paper, spend hours in the dark room, and even more hours in the CADD lab, no every time i have a drink I'm supposed to consider if i'm having that drink because I want to, because I had a long day, because i'm upset or because i'm feeling pressured. Yes, some days nothing sounds better than a cold beer to end the day with (like today) so who's business is that? Mine. I'm 21, i'm responsible, i don't drink and drive, i never even drunk underage at bars.
It is just so frustrating that i can't even enjoy college sometimes because i can't stop thinking if what i'm doing is right or wrong.
Maybe one day my life will be normal