He's deciding, christa, and that's a perfectly good place to be right now. It's much better than, "I want a D and don't have any feelings for you anymore," right? Give him the space and exercise sound judgement and patience (sounds like you're doing an excellent job of this!), and it will shift the odds much greater in your favor. The fact that he is explicitly telling you he's scared, doesn't want you to leave him again, etc, means that he wants you to know he is invested in the M still, yet wants to make sure you know what you need to do to reassure him things will be okay and that you'll be there for the long haul.
Keep doing what you're doing, christa -- you're going to bust this D!