be/have been

[wowenglish1]

I would like to know the difference in the meaning between "1" and "2".
1. My cat died today. I'm really sad.
2. My cat died today. I've been really sad.

 

[bhaisahab]

I would like to know the difference in the meaning between "1" and "2".
1. My cat died today. I'm really sad.
2. My cat died today. I've been really sad.

#1 You are still sad.
#2 You have been sad up to this moment or until quite recently, but we don't know if you are still sad.