Some people can totally fake it. They can smile and laugh; they can act like everyone else, even while they are in excruciating emotional pain. Occasionally people who can do this end up killing themselves, and no one can believe it. People who are depressed but act like they are fine may not confide in anyone. Usually they find a way to spend time alone crying or letting down the facade and then go back to acting when they have to be with people. I’ve had clients who lived with their families and only found time to cry after everyone went to sleep, and only in the bathroom. The rest of the time they were acting like someone who wasn’t in pain. On top of the pain they already feel, acting happy is emotionally exhausting, and having this secret is isolating. So, faking it can even increase the depression.