Hmm.. Yep, I'm fine. Oh, wait... how do you define "fine"? I smile, I laugh, I talk, I go to work, I watch movies, I go out and eat. But then, I sometimes feel something is missing and it seems like it's eating up my soul from within. I feel lost, I feel sad, and most of the time I enjoy the company of silence. This is who I am. So, now tell me... am I really fine?
kidding aside. go outdoors, have an activity like walk or jog or just sit and let the sunshine blast you its rays of light. you'll be amazed on the rise of dopamine in your body and you will have better chance of positive outlook in life.
take a break din. go on a vacation. identify that missing piece and work on it, else, list down the things you are thankful or things you want to do. its okay to be alone and have alone time. its addicting.