Welcome!
Lots of support is here for you.
I want to ask if you've looked into why you are drinking when you are alone? And getting drunk in 2 hours? And you are university age...what is going on where you want to be drunk in a short time, alone? Is it out of boredom? Avoidance? Is it time you need to be spending on school work?
I don't want answers, but have you written anything down as to what your goal is (drinking) at that point? Something for you to look at on your own and to consider.
I wish you well!