Oh honey, you aren't alone
This is my 5th Christmas without my dad, and my 3rd Christmas without my mom. I'm just now getting to the point that I can enjoy it on my own, but they are still with me. I think hanging up his stocking is a wonderful way to make him a part of Christmas.
I went through box after box to find the traditional family ornament that was my dad...Scrooge! It's kind of like a shrinky-dink ornament..one of many my mom and I made one year when I was little. We always called dad Scrooge because he always complained about decorating for Christmas and was in a rotten mood for a month, but come Christmas morning, he was the biggest kid of all.
You need to include the people you love in the holiday, even if they aren't with you physically, because they are still with you in spirit and in your heart. It is hard sometimes...mom always said Christmas was bitter-sweet. I didn't understand what that meant for a long time. Now I do.