You will often dream about his old man's house now, which shows that your feelings for him are really deep. Try dialogue, similar to hypnosis. Talk to yourself and tell grandpa what you want to say most. It's appropriate to sweep the grave. If possible, find a time to go to his grave and talk to his grandparents. Or when dreaming again, try to tell his old man that you love him very much ... or does grandpa have any unfinished wishes to learn from his parents?
The dead are gone, and living well is the greatest comfort to our ancestors! Isn't it three generations of single transmission? He has great expectations for you. Work hard!