anyone know anything about dreams?..

my name is Erika and my Grandpa passed about 8 months ago. out of everyone in my family him and i had a special bond. i never left his side when i was younger and growing up i always made sure to call everyday and visit as much as possiable. and now that he is passed i call and talk to my grandma every morning and every night before i go to bed bc im so affraid of loosiong her too. i never had a father figure in my life when i was really little so thats why i think i was and still am still so attached to him even though he is now passed. i have been having dreams about him a few times every month and dont know why im the only one in the family who sees him in my dreams. in my dreams hes always sitting in this lazyboy chair that he loved at my grandmas house. growing up i spent a lot of time with him in that chair. and when i think of him i always think of that chair. he was in a lot of pain for the last few years of his life and it killed me to see him like that. im also going through a lot in my life medical wise right now bc i have been dealing with Crohns disease for about 2 years and it has been hell.it seems like whenever i dont feel good i see him in my dreams. could him showing up in my dreams be like him warning me to take care of myself?..

if anyone knows anything about dreams and knows why i might be having dreams like this please message me i feel like im crazy bc i cry for days after having dreams of him bc i miss him so bad.