It doesn't take a lot of energy for you to see things that other people aren't seeing today. You can look beneath the surface of what people are doing with one quick glance. You can see that someone's smile is a false front, and that their happy-go-lucky attitude is just an act. If you feel like it, reach out to them and let them know that you can tell something is up with them. Let them know that you're there for them when they need to talk: because soon they will.