Siento tristeza
Estoy triste.
Me siento triste.
estoy triste
ella esta triste
Estoy triste (I am sad right now) Soy triste (I am a sad person)
Me siento terrible
Yo siento enfermo
Estamos triste.
estoy triste
El pescado es triste = The fish is sad.
ella esta triste
el esta triste
estás triste
I don't really get what you mean, but if you want to say, We are sad, its just We are Sad. If you want to know how to tell if you are sad, do you feel a sinking feeling in your heart? that means you are sad. If you want to know how to talk to people about your sadness, then you could explain why you feel sad, and the steps you want to take to solve it.
No quiero hacerte triste.
I believe it is Sientolo
sentir or siento
I have had that kind of experince so with no respect or encouragement i say sad or mad mainly sad
i feel young = me siento joven