Each person is responsible for his or her own happiness, so do not feel obligated to put a bright smile on a sour puss today. It's too much work for too little effort. Some people are happier when they have something to complain about, so let them be miserable while you choose happiness. Your perspective is spot on, so don't let a negative person in your life tell you there's no such thing walking off into the sunset. Prove them wrong by being happy.