When we ask each other in English how we feel we are usually referring to how we feel emotionally of how we feel mentally.

Answers to this question could include- I feel excited. I feel anxious. I am feeling hopeful. I am feeling down. Things are not good. 

We usually have a follow up question- What's going on? Do you want to talk? Is everything ok?

And well wishes-

I hope things get better. I am here if you want to talk.  I am excited for you. Thank you for sharing with me.