YEs, pretty typical.
Narcissitic supply is a good phrase, but I also just heard something in a group meeting at my As rehab facility, when they had the family come in to talk about enabling.
The phrase they used was,"try to become conscious of the ways that you have always felt his pain for him, averted his danger for him, sheilded him from feeling the lonliness that his addiction has caued him to experience..."
They spoke about how if we insert ourselves into the mix too deeply, we can just be a buffer.
It sounds to me like he is desperate to have his familiar buffer in place, which would be you.
He wants you to take part in the holiday stuff, because it will be painful, difficult, or otherwise inconvenient for him emotionally.
It sounds to me like you have your head screwed on pretty well in this.
Kepp up the good work!