Holidays Without My Sweet Girl, First Christmas without my cat Options

[Precious26]

Coming home tonight from my boyfriend's family's dinner, I knew my sweet cat of 20 years wouldn't be here to make Christmas eve complete the way I have always remembered. It was very hard looking at our porch where she always was. I just wanted to go outside and grab her, but it broke my heart she wasn't there.
It's been a month now since I had to put her down for kidney failure and it still hurts. I still miss her terribly, despite having a new kitten in the house. I wasn't ready for a new kitten, and still am not some days, but my mom was hurting just as much from the loss of our old cat, so she needed a new friend. It has helped some, but this is the first Christmas I will remember without my sweet girl.
I am not sure how to deal with this situation this holiday. I've lost family members and have missed them at Christmastime, but this is different. She was always there to help me through missing those family members, but now I don't have anything to help me through missing her this holiday.
How do we cope with the loss of our furry friends and companions through holidays? She should be going to sleep with me tonight, but instead I'll be going alone. I am just not sure how to deal with these feelings. If anyone has any advice, it would be much appreciated.
Merry Christmas.