Hi, I'd like to help you with your question.
I agree with you, taking a break may mean that your boyfriend is having commitment issues. Maybe in his mind he is thinking Christmas usually means engagements or special and meaningful times with your partner, especially if you have been together for as long as you have. This may trigger his commitment issues so taking a break may help him feel he is putting some space between you and give him less anxiety. Maybe a friend said something to him or a family member about being more committed in the relationship and it triggered his commitment anxiety.
The fact that he wants you with him is a good sign. It would be much more concerning if he didn't want to be together at all. So that may mean he still wants to be together, but is fearful of the expectations on him. This may be a good time for the two of you to talk this issue over. If there is to be any future for your relationship, your boyfriend is going to need to talk this out, either with you or with a therapist.
If you do decide to see him and talk to him about this, try approaching him in a gentle and non threatening manner. Tell him you would like to get his thoughts about the situation and talk it out so you and he both know where you stand. Keep your statement all "I" statements, such as "I feel confused by taking a break....". If you avoid blame or accusing he will be more willing to talk.
If he refuses to talk to you about this, you may want to suggest therapy. If you cannot go together, ask him if he would go on his own. You both have been together long enough to establish a serious relationship with a good future, so therapy is a good option to keep your relationship healthy and to address any problems now.
I hope this has helped you,