Kevin,
It sounds like your gf is a keeper! I'm lucky to have a wife that understands my quirks and struggles with A & D as well. However, I will warn you that you really need to develop a strong coping mechanism outside of your gf, because if you split up or are arguing, being too reliant on someone else is not a good place to be. I've been down that road and it makes for a lot of insecurity.
I really encourage you to seek out professional treatment for A & D. You will need to learn skills for the curve balls life will throw at you. I thought I was in a good position with mine, until we had a kid born with health problems. Fortunately, he is fine now, but I was in rough shape for a long time. I felt helpless because I couldn't do or fix anything and EVERYTHING was out of my control. I was having regular panic attacks and my wife was in no position to provide support to both my son and me. Plus, I have battled some of my own health problems, and my wife simply doesn't have time to hold my hand and care for a toddler. Thus, I'm left to fend for myself, which can create an endless spiral of A & D.
If your gf is "the one" it makes a lot of sense to engage her in the treatment process. She too has a voice and role, and if not now, at some point she will face frustration and resentment about the situation and your lack of independence. At least that is how things manifested in my case, and my psychologist has said that he sees a myriad of problems in relationships where one partner has significant unresolved A & D issues.
Certainly, I'm not here to preach or pretend I have all the answers...God knows I don't. But, I've been dealing with profound A & D for 20 years (I'm 42), and wish I could go back in time to tackle things more aggressively than I did. Time has a funny way of complicating things.
I have participated in hundreds of hours of CBT over the years, and am just now beginning to unwrap the D piece. For so many people it is inextricably woven into their A and trying to unwind the two is a real treat. You're right to be concerned about the prospect of her getting overwhelmed at some point. A & D filters nearly everything we do. So, it's critical that you at least have an independent outlet for which to share your thoughts and concerns. I would go so far as to say your gf (who may become your wife someday) will really appreciate you stepping to the plate to get help. My guess is that if the shoe was on the other foot, you would encourage her to do the same.
Ace