Your third year of middle school was probably a tough and busy time. You may have had trouble getting enough sleep. We all know that not getting enough sleep is not good for our health. But it has been found that less sleep could even cause you to have fewer friends, the Guardian reported.According to researchers from the University of California, people who don’t get enough sleep are less willing to socialize (社交) with others. They are simply too tired to go out.The researchers did a small study. They tested 18 young people who had just had a good night’s sleep—as well as tested the