Maybe don't consume high-calorie drinks or don't drink as much as you do now. Weight loss, and maintaining that progress requires a lot of discipline. We have to cut out things we can't imagine living without. I gave up bread, didn't think it was possible but here I am, and I don't even desire bread anymore.
Also, you can have a lot of fun with them even without the drinking. Uni fun doesn't have to revolve around drinking. There are other things to do. Maybe cut down the time you spend drinking into two halves and replace one half with another activity.