Loving Someone with Bipolar Disorder
http://www.amazon.com/Loving-Someone...8243353&sr=8-1
Although I haven't read this one, I have heard good things about it. One of the authors has bipolar disorder and the other one is a clinician, so you get both sides.
I think education is a key element of any relationship working within the context of bipolar disorder. Even though "we are not our illness", it can feel like it makes up a large part of our identity and personality. When that gets out of whack, or is ultimately termed "pathological", it can be hard to cope with. Remember too, that you are also on a learning curve. Now that you have your new diagnosis, you will likely need to adjust your lifestyle to accommodate it and find balance. Your boyfriend needs to decide whether or not he is willing to take this journey with you. Just be sure to let him know that the mood swings are treatable, and that you can be well again.