This is really the only need that requires other people. You could conceivably make your own house and sit there alone meeting all of your other needs, but eventually you'd be miserable because of loneliness. Be sure to greet people who walk by on the street and maintain at least a few friendships. You can call those people and talk on the phone, or chat on your computer too!

The Sims 2 Tips, Techniques and Walkthroughs