Hi Don. I have only been to this board for about a week, myself. Everyone is very nice to talk to and there is a great deal of information to obtain on DID from the boards. I don't have DID, but my mother has it. Like you, I know what it is like to feel like I bystander while a loved one is going through this. Certainly, I don't know what it is like to be in a romantic relationship with someone who has these experiences, so I will never pretend to know exactly what you are going through. Nevertheless, I know how hard it can be to just want to find answers; to want to know how to connect with the parts of the person you are seeing come out.
I first came here last week regarding a question about one of my mother's alters that may have another diagnosis, which makes it difficult to get along with them. This alter is not comfortable yet with sharing who they are or acknowledging that there are others. I have found that, in general, it has helped to acknowledge that something is going on, but in a supportive way. At first trying to acknowledge it, seemed like it wasn't helping, but finally progress was made, and I know two of her other alters pretty well. I know I have met others, but they aren't ready to be known yet, especially "the difficult one" I see fairly often (especially lately). I would say "the denial" and the constant lapses in memory are the two main things I hope will improve soon. I hope she goes back into therapy, and stays with it. Until then, I try to do what I can to make my mum and the other alters feel welcomed. It isn't easy still living at home, because for every time I try to be supportive, my father (parents are still married) is not often supportive. His inconsistency and regular anger compound the issues my mum is going through. I am staying home a quarter from school because of the situation, but it is a temporary solution. She said she wants to go back to therapy, but we'll see. The hardest part may actually be getting my dad to seek help. It isn't about "dropping my mom off somewhere to 'get fixed.'" He needs to seek help as well. The whole family--collectively and individually--needs help.
So far, coming to the boards has made me feel a lot better, during what has been a disastrous holiday season. I hope you continue to come to the boards as well, and ultimately, I hope you and your girlfriend can have outside help. Unlike my father, you are already on the right track.
Katie