Life doesn't suck for everybody, but at the same time, some people are really good at smiling through the rough times. If you want to know if someone's life is good, or if they're just faking happiness, then just talk to them and ask them about their life. Try showing interest in others. If their going through some hard times, then they'll appreciate you taking interest and appreciate you providing an ear to listen to their problems. You may even get a new friend out of it.