If you are not sure yet if the relationship is over for good, then I can understand you not blocking him on facebook. My impression is that you wanted to take a month's break from being with him. I think you should stick to what you decided, even if he doesn't. Making any response to his comments on your facebook page gives him the power to force you to interact.

Also, if you think there is a chance you two will get back together, then you don't want to teach him that what you say has no staying power. Then he'll learn that all he has to do is wait a bit and you will be back in the usual groove. I think he's testing you. I doubt very seriously that he is confused. He is gently pushing the boundary. But he does mean it to be flattering to you. He wants to keep the door open between you two.

If you do decide that this relationship is over, then do consider blocking him. But wait the month, as you decided. I think that, if you stick to your guns about not being lured into giving him any resppnse for a month, he will have more respect for you, whatever you decide about the relationship.