The above advice is good, I concur. However, you are talking to happy medical students. There are indeed a number of unhappy medical students, and you may or may not meet them on interviews. They are typically those who went to medical school for the wrong reasons, ie family expectations, not knowing what else to do after doing well in science, etc. These unhappy, as mentioned above, may be the ones that have the wrong expectations, like living as an undergrad. However, in almost every field you enter, whether its law school, med school, or professional job, there are few that you can continue to live an undergrad's life. Try to make sure your motivation and expectationsa are reasonable.
I suggest you pick preferrably one or maybe two hobbies/passions that you have, and stick with it in medical school to keep yourself sane. Most people can't handle much more than that. If its Traithalons for you, stick with training, and put off your softball, etc. If its book club you like, stick with it, but put off your competative chess. You'll continue to be as social/antisocial as you are, as much as you like or try. Your undergrad friends will see a change, but you'll see a change in them too, and your relationships will evolve as you make new friends from med school. If you don't want to talk about medicine all the time, then try to branch out and make non med school friends, study where few med students study, etc. Thats how my roommates and I keep sane/happy.
sscooterguy
