I'm sorry for your loss. I lost my Dad in March of '15, a few weeks after his 76th birthday. We knew it was coming, as he had been battling kidney cancer for 18 months, but it was still a shock when he was gone. My Dad was my best friend, and I still miss him everyday. Your Dad sounds like a great guy, and it will take time to adjust to his absence. At least you have lots of great memories.