Oh Jessie. That's hard. I'm so sorry for your loss. They are such babies to us, and real friends.
Try to remember that it is completely natural that you would mourn your beautiful dog's passing. Could you remove yourself from the festivities and go and rest and be alone with your thoughts and memories? Somewhere that you can get a hug rather than be surrounded by people who are drunk and partying and emotionally unavailable?
Hugs to you. BB