Smiling depression patients often smile to hide their emotions, and we often have a similar situation in real life. When you work and live alone outside and talk to your parents on the phone, you have learned to report good news rather than bad news. The disappointments in work and life turned into tossing and turning at night and understatement of "I'm fine".
In fact, you don't have to be so, you don't have to pretend to be strong, you don't have to pretend to be calm, you can be wronged, sad, hysterical, tell your emotions and your bad news to trusted people, and let them help you. Learn to call for help to the world, and the world will be gentle to you. Singapore Publicis once made a public service advertisement about the emergency distress signal, which reversed the English "I'm fine" to "save me".