Hi Mandi. Not much to add to what everyone else said except to send you all the best wishes possible. Being sober at university is not easy, when it seems like everything revolves around drinking, and (for most people) alcohol still seems fresh and exciting. Don't despair or be hard on yourself on account of what your feeling - you're doing something great and difficult.
(I like your sig: "The best solutions are often simple, yet unexpected." Reminded me of something Charles Mingus said: "Any fool can make the simple complicated, genius is making the complicated simple.")