<human>: So I am a Junior in High-School. I'm an introvert, play video-games, got A's, B's, and C's, read manga, have three really close friends, a mom and a dad in a health relationship and a younger brother who annoys me, and a girlfriend who I've been dating since I was a freshman. IE: I'm average.

My girlfriend is much like me in some ways: She's ADHD like me, also a junior, she's very creative, and she has a younger brother (also annoying). Now don't take this the wrong way, but in some ways she's different from me in a bad way: She's got Older sister(s?) that run away or have issues with her once divorced twiced married mother, she's very flakey to the point where I sometimes feel as if shems not loyal, she believes she is the only person on the face of the planet that has family problems, hates a certain genre of ___, or likes ___, and she doesn't understand sarcasm (something my entire family lives and breaths). On top of all of this she's very childish, and she often talks about how she liked the cartoon her brother was watching on TV the other night which is obviously for kids.

We don't fight about stuff like that much, but I know one of these days I'm going to make a snide comment that she doesn't take lightly and she's going to hate me for it. A couple of times I've been able to talk myself out of it but I don't know what I'm going to do if, more like when, I say or do something that she wont let me get away with. So what should I do if she gets mad at me?

Can you give me the gist of the text in a nutshell?
<bot>: I'm a normal 17 year old guy and my girlfriend's personality is one that isn't very understanding of "normal". What should I do so I can prevent/deal with her getting really angry at me for being who I am?