Bi polar & arguing

100 miles an hour seems a bit fast for bipolar 2. Anyway.

Though my situation is maybe a bit more extreme (I'm paranoid schizophrenic and my wife is bipolar 2), I can certainly identify with the big arguments out of nowhere for no reason.

Picking up those books was probably one of the best things you can do. Learning more about your disorder can help you recognize symptomatic behaviors, which tend to inflame situations like yours. You'll have to develop some new skills to help you not fall into the trap of bipolar taking over your responses.

Do some research on fighting fair, it's essential. Share what you learn with your gf and agree to some ground rules for conflicts. And perhaps most importantly, you have to learn when to walk away from a fight. That's one of the hardest for me.

Hope things turn out well for you.

100 miles an hour sounds right to me. Symptoms of BP are similar to ADHD symptoms. Your doctor can treat you for both. I am bi-polar 2.
I wonder if BP can differ between males & females. I swear my boyfriend has bipolar. He gets moody every night. EVERY night. I used to be quite moody & still have my moments. His mood swings are definately not normal. (he has other symptoms as well)
But back to you. Please be assured, it is most definately YOU. And remember this as your loving wife-to-be deals with your moody, sometimes irrational, ass in the years to come. Always, ALWAYS apologize. Even if you don't feel like you should. If you are still having mood swings like that, I definately think your meds are not working. Finding the right medication(s) is done by trial & error for every indvidual. After I had my son, I had to change mine & went on Lamictal & vyvanse.
So how does this BP 2 girl deal with her potentially bipolar boyfriend's mood swings? Lucky for him, I'm empathetic to the moodiness, irritability, depression, etc. and I am really able to overlook most of it. Try to help your girlfriend understand that it's really, simply a medical condition...in your brain. It cannot be "cured" and the only thing medications can do is increase the time between episodes. Meaning they will be less frequent. I know that when he flips, it's usually over meaningless stuff and not an important issue in our relationship. This should make it easier for her. She should do her best not to engage with you or try to see "what your problem is". Just like when someone is doing something idiotic & annoying, you just walk away from it cause, what's the point? You don't acknowledge their behavior becuase that would just encourage the behavior.
Lamictal really works well for me. The only time I feel like I have any "episodes" is when I have PMS. Again girls vs guys. I wish I could tell you how long it is between my hypo-manic & depressive episodes. But I am confident it is, at the MOST, 3 hypomanic episodes a year. More likely 2. The only time can recognize it is when it's lasted more than 3-weeks. Talk to your doctor. Your BP meds should control your daily mood swings.
Good luck with both!