What constellations are obviously unhappy, but they always like to pretend to be happy?

Sagittarius. Sagittarius loves to laugh, but actually they just think that smiling is a good weapon to protect themselves. Sagittarius has many smiles that are not from the heart. They think that smiling can disguise themselves and protect themselves from harm. So on the surface, Sagittarius gives people the feeling that they are very happy. Even if they are unhappy, they will smile, making people feel that they are not unhappy. Sagittarius always has a group of friends infected by his smile, but who knows that Sagittarius is actually just to protect itself, and Sagittarius's smile is always misleading.

Aries. Aries is free, cheerful and optimistic. They are always happy, as if there is nothing sad, but Aries just won't let you see them unhappy. Aries will be very emotional and sad when she is unhappy, but if there are others around, Aries will hide her unhappiness. They don't want to express their unhappiness. They will silently digest themselves in a small room, silently recall themselves in bed, think about something that makes them sad, and then hide in a psychological corner, not knowing when they will come back.

Pisces. Pisces has many friends, which gives people the impression that Pisces is good at socializing. They have strong social skills, but at the same time Pisces also gave up a lot to get along with others. Pisces actually has unhappy times, but most of the time Pisces hides his unhappiness for socializing or not making friends, because Pisces is good at making friends, and he knows not to make friends sad.

Finally, the above views are just my personal views. I think Sagittarius, Aries and Gemini

Pisces is very passive in disguising itself. They are not hypocritical. More often, they just don't want their negative emotions to affect others. They are very kind.