I avoid visiting that country. mainly because i'm afraid to see my granddads favourite spot on the couch being empty.
Everyone has their own way to cope with a siutation like this, I guess. But maybe it's necessary to "visit that country" to keep going. To close the book, find an end, take a step on the ladder of grieving. I don't want to press you into anything, but I think it would be best to think clearly and take the required steps (even if they are hard) that you think are best for you to continue living.
Posting here already is a kind of reflection. I guess you already are on the right way. Just go on trhough to the end.