Hey there,
I wanted to reply because I was 13 when I lost my grandpa who i LIVED for (i am now 20). i was his shadow, i spent every friday and saturday night at my grandparents' house. i wanted to respond because of something you said in the post before about only knowing your grandpa for what seems like a short time. i have thought about this before and have realized that it doesn't matter how long you spend with someone like a grandparent because you love them just the same, you know? over the years, your love and appreciation may change in the ways that you perceive them, but you still love your grandparents all the same.
i wish i could say something to make your situation a little easier. all i can do is give you advice from what i went through... and it's this: at first, when i kept seeing my grandpa's face and hearing his voice in my head and during my dreams, i wanted it to go away because it was too hard for me to have to keep seeing. what i learned is that i didn't want these memories to go away at all, i just needed time to make it easier to see them.
ill be praying for you and your grandpa! i'll be here to look out for you!