Relax and don't worry.No one will force you into social events you don't want to take part in . You will find all types of students in your first year. Some will reside in the student bars ,,,some on the sports fields ,,and some will spend most of their time in the library. What I would advise is that if possible you spend the first year in a Hall of Residence. You say you don't want to make friends but in the library you will meet students who are concentrating mainly on work. These people could be a support and help you in various ways. Look forward to your time there ,,don't worry about it at all and good luck ...If you want to talk more about this feel free to e mail me. My student years were in the early 60s but I have lectured to University students so I know their worries and the problems they face