Drink an alcohol in college campus

Once i was in my degree college with my friends i drink an alcohol in the college campus in the college classroom.I had an whisky and friend's have an beer after drinking an alcohol we were not in control and we had an fight with the watchman of our college and we really hit him very hard and we had complaint against the watchman and he was removed from the college. Now at the point i feel very bad  about it.So these is the confession i have to be make.