Being happy with what we have

We can choose to be unhappy even when we have all that we need 

I was looking at my Facebook profile earlier today. My friends were roaming around the world and posting pictures. Then I saw, my seniors display picture on WhatsApp. He is in a toy car with his daughter in a shopping mall in Chennai. They looked happy and he looked happy. 

What struck me was, who should I relate to? If I relate to my friends on Facebook, i would be sad. If I relate to my senior, I would be happy. Then I felt, it's basically upto me ultimately.