I've been there. My friends always got angry and told me to stop making "my annoying face" whenever we hang out. They said I have a signature face expression that I usually made after several hours of outing. The truth is, it's my not-smiling face, my natural being. I'm a mixed blood child of Chinese and Malay. Stern face is what I have. I don't have sweet face like people who seems like smiling eventhough they're not. And I wasn't even angry. I was just awfully tired. I'm an extreme introvert, I could stand not going out for 3 months. Socializing depletes my energy. Going out is like going to war. I need to prepare physically and mentally. Sometimes, I got fed up with my friends saying the same thing about my annoying face over and over again. To shut them out, I just say that i'll go for plastic surgery to fix my annoying face that annoyed them so much. When I explained that I was tired, they rejected the whole idea and said they're tired as well but doing fine. I try my level best to cope with most of my extrovert friends. They don't even try to be in my shoes. And now, i'm happy to live far away that we could just hang out for once or twice a year.

Sometimes just getting through each day requires almost superhuman strength ~ Excerpt from After You by Jojo Moyes