Should I greet my ex this christmas?

Problem/Goal: I miss him so much and I want to greet him this Christmas.

Context: We broke up recently. I am the dumpee. I have been having a hard time accepting what happened and so there were a few (long) messages sent pa days after we broke up. He hasn't been responding to any my relapse chats. The last one was me asking if we can talk. No reply. I am giving myself the whole month to feel everything and be delulu. Although I'm doing a few things na to help myself, like journaling, hiding a few pictures at a time, talking it out to some friends, etc. But I am allowing myself to take it slow muna. I'm planning to send him a message before this year ends or maybe even on the first week of Jan.

Should I send him a message na to let him know I'm thinking of him and his family? Or should I just send one a week from now? I feel like if I send a message now, I'd feel ashamed to send another one (that is more thought of) next week. But I also, I want him to know that they're on my mind on Christmas.