me (19M) and my gf (19F) have been dating for an year now, last night, we got into an argument and she started getting mad at me saying that I was taking my best friend's side over hers, for context, my best friend (also 19F) is a friend of my gf, but they were talking less now after their classrooms changed due to different courses, it has always been a trait of my bestfriend that she doesn't approach anyone or talk to anyone unless it's her boyfriend. My gf made eye contact with my bestfriend and smiled and walked away, as she hurried to class, my gf thought it was very insulting and that she was ignoring her, I told my gf and explained to her, that she has always been like this since the start and does the same to me too. (my gf does the same thing with others) and I told my gf, that maybe instead of thinking she's ignoring you, just approach her and talk to her, and you will see that my bestie will talk back to you and even initiate convos, to which my gf replied that I was taking sides, I tried to explain to her that I wasn't doing so and simply wanted them to not end up on bad note. 10 minutes of back and forth bickering later, I told her that if my gf doesn't want to talk to her, I will bring up the Convo in front of my friend and ask her why she didn't approach my gf that day, to which my girlfriends words were, "you always make me the bad person in front of others, you will make me the bad person in front of her too." I'm not very big on feelings and words don't hurt me at all, but this particular sentence hurt me so much, because I have never , NEVER badmouthed her or insilted her even in front of her, or any of my friends, not even as a joke, because I truly love my gf, but idk why she said so. I told her what she just said has hurt me a lot and that she shouldn't have said it like that, to which she replied, "you don't care about my feelings and never understand me, you only want to take your bestfriends side", I don't understand what I did wrong, all i wanted to was for them to not end up on a bad note. TL;DR - My gf and I got into an argument she told me "you always make me the bad person in front of others, you will make me the bad person in front of her too." even though I never have badmouthed her, and it has hurt me a lot, am I the wrong person for taking it in such a way?