What's Real?

A white dog, a yellow ball and ground covered in grass. He was looking forward, seeing the smile of his pet, the ball he bought to play with him that reminds him that he has not played with him for a while and the beautiful green ground. He is thinking again that it has been six years of living alone. Or, was it just yesterday? He still remembers it clearly when each one of his family members was there for the last time. The last gathering. It is just an old man with his pet. A creature that is good with filling this void with joy. But, he is still wondering, is any of it real? Is he still here, or did he just leave with everybody else? He looks over to the small wooden house. It looks more like a room built in the woods than a house. There is a chair inside and the TV is still on. He looked around for a bit and thought, does anything become real once others can see it too? Do senses need validation, just like what's inside of each one of us?