I also dreamed of my dead grandfather. He didn't talk to me, so he kept walking and I followed him. Then I met a neighbor. I couldn't hear them, so I squatted on the ground to play. Then they left, and I couldn't catch up. It seems that I want to control my dream after I have had this dream.
You miss your grandfather very much. You must dream about him often. It'll be fine if I dream about something next time, but I really want to dream about+_+
I used to want to know how my grandfather was doing, but I never dreamed that he was the best to me, so I felt guilty that I didn't like him. The doubts gradually faded, and I prayed that Grandpa would get better.