@TS Bro... visit your grandparents, they are mild enough to visit you.

And remember if you are a Catholic(or you believe in God), pray for them all the time. If you are an atheist, think of them in a happy manner.
i think they miss you....
A very helpful way to do when dreams becomes bothersome or if you are really curios what they "might" mean... take a time to ponder start from the middle of the dream (the person you have dream about, or the things you dreamed about) then branch out certain possibilities and connections you have with them, your past experience with them or perhaps forgotten aninversaries etc.
Don't worry im not speaking from books, im speaking from experience.