Taking stuff for granted.

I'm not sure where to start. What to say, or how to say it. I could be blunt, or go into some whole fucking metaphorical reasoning.
Whatever comes out, comes out.
Ok. Here we go.
I found out that my Grandpa is very sick. I've known this, but today he was hospitalized.
I've never been close to my Grandpa. I mean, sure, he was my grand father, I love him but we never had much of a bond. This is where I start to feel guilty.
I have lived in Soledad for the past 9 years.
My Grandpa has never lived very far from me. Maybe a 30 min walk, a 5 min car ride.
With in these past 9 years, I'm pretty sure I can count on my toes and fingers how many times I went over. To be honest, going over to Grandpa's house was boring. I really only went on Thanksgivings and his Birthday. First regret.
When I did go over, we never talked much. It was always the same thing. "How are you" "Hows your mom/grandma/dad" blah blah blah. Continuity. No REAL conversations were hardly ever made. Second regret.
I was always the Grandchild that he never saw very often, but when I did see him I could see a light through his eyes that seemed like it was brighter than the sun. I know my grandpa loved me, maybe no different than any other grandchildren, but it was still love.
I wish I could have realized that maybe I should have made an effort to see him more often. Maybe I should have went over just to talk to him. Just to listen to stories.
I mean, he was my ONLY grandfather that I ever met. I sit here and I wonder why. why. why. WHY.
I regret all of this so much. I don't know what to do.