If I tell you I am upset about everything that's going on around me, you will probably ask 

me why, half listening, half wandering away in your own train of thoughts...

If I tell you I am happy, you will probably not bother to know why, congratulating me and 

forgetting..

I should rather tell you I am fine, satisfied, you will probably tell me your own issues then, 

for which I will be all ears :-)