I do that a lot. Sometimes out of necessity for work. Having an emotional breakdown or telling my coworkers I don't like my life isn't a positive thing for me. I have learned to find some people I can talk to and discus how I am really feeling. I think everyone needs that, especially when you are in a real low place. Putting on a smile and pretending like you are ok takes a lot of energy. Sometimes it can be a relief to answer that question honestly and have the other person can and give thoughtful advice to your troubles, provide reassurance or just listen to your struggles. I think most people need a person they can be real with. Otherwise I don't think anything gets better. You feel like you have the weight of the world on your shoulders, are barely coping with day to day and get ground down until you break. At least it is like that for me.