^^ ^^Maybe they just seem perfect on the outside? You know, some people are really good at hiding their problems.
Like SIers for example. I do all kinds of things in my parish (choir, mass servants - altar boys and girls, youth group, kids who are getting ready for their confirmation...) and I'm probably the last person for people to think is deeply in trouble. What I'm trying to say is that maybe they are just not all that happy and perfect on the inside? Try talking to them? You might find out some amazing things about them.