Hi, I can help you with this today.
Facebook. After all you have lived through, after reconnecting and getting to know someone who has come to mean something are you going to let a legitimate remark about his status on facebook ruin your relationship? Think about why he said he isn't changing his status, if he does everyone is going to be asking "who" and he doesn't want to let the world know his business. It, as you say was probably a big misunderstanding so I would suggest you wait until he calls to clear it up. If he feels the way he says he feels about you then you'll both get through this. As much as Facebook allows us to keep in touch with others it certainly can be detrimental to a relationship. This misunderstanding is just that. You said in your post, his actions and words show he cares, so there really is no problem only a choice not to share this with anyone and everyone on facebook.