Grief is a very individual process and there is no right or wrong. I lost my mother and father 5 years ago and there are days when its still a struggle to get through. Its not true that time heals all wounds, but it does make it bearable. I doubt that there will ever be a time that I don't miss my parents, but I am able to remember the good times we had and the love they gave me without being overwhelmed by sadness now. Don't let anyone tell you that you should be over it by now..or any of that other stuff that people say when they've never experienced a loss. You take the time you need, but if you feel you need some help look for a Grief Counselor.
Grandpas... there's nothing like them.
I saw Wilford Brimley in a commercial yesterday and it brought tears to my eyes, my Grandpa and him could pass for identical twins. I miss him still, every day, but now it is more tolerable and bittersweet. One day it will become more bearable and don't let anybody make you feel it was "just a grandpa", it's obvious he meant a lot to you. God bless.
I lost my Grandfather in Dec 2000 and just last night as I watched the moon rise I was crying my eyes out remembering him .......he'd always call our house when there was a big, full moon rising and say "look outside, the moon is beautiful". So, to me, it's perfectly normal! Take care & God bless. :)