when you were living with your parents over the summer, you said you couldn't WAIT to get back to your apartment and school to focus on yourself.
Maybe school should wait and you should go back home to the safety of a structured life. where you drink in your bedroom at night and go out with friends and get drunk. here and there, booze is everywhere....You need some help from someone who can get you on a better path. I did not know you only weigh 110# you had stated previously that you were "overweight".
Call your parents and ask for help, real help, this is more than alcohol abuse....it can be fixed but you have to realize your head is all over the place.