Is OTHER wrong in the post ? POST : Some backstory:

My friend Anna (20F) and I (20F) have been best friends for 8 years and started liking Kpop 5 years ago or something like that. We were both around 15 when we started liking Exo but it only lasted half a year to a year for me because I just don't like obsessing over artists the way that I need to see every interview and every episode where they supposedly show their "true self". Fast forward a few years and our other friend Nicole (also 20F) joins us. Anna is still following EXO while I haven't been catching up with any news and only listened to like two songs or something. Anna started introducing us to BTS which was really fun at first and they are really good artists imo. 

 Onto the story:

1. Last summer we went to South Korea for Holiday (mainly because we were all pretty much still fans of BTS). It was really fun and we had a good time overall (no fights between each other or anything like that). So one time we were hanging out with our neighbours, drinking soju and eating some really good food, when I (pretty drunk) remembered how Anna told me that if you pronounce Joker a certain way it means Big Cock or something. Now me being drunk said I'll pronounce it very carefully and obviously fucked it up, hence the two Korean boys couldn't stop laughing and it was pretty funny too. It's been more than 5 months since then and they still tell the story, even when non Kpop fans are present and then explain while the other people usually just look at them weirdly. 
2. There are no normal conversations with Nicole anymore. The only thing she talks about is Kpop and literally nothing else. She's not the most outgoing girl and that's fine and everything but then she starts saying she only wants a korean boyfriend and that she wants to live in South Korea (even though she's not even trying to study korean). I don't even like our ladies night we have anymore because we'll usually watch something funny or talk or whatever, but now it's just become this huge Kpop thing where we only watch Kpop videos, listen to Kpop music and if we're not doing that Anna and Nicole are trying to do the choreography (which is fine but please let's not do it at 3am). Even when other people are there Nicole still turns on Kpop and the videos.
3. Even in normal conversations in public spaces Nicole will randomly start dancing her favorite parts or respond in her few korean words that she knows. Whenever I say "I don't know" (which is kind of often tbh) she immediately responds with "NAN MOLLA" ("I don't know Nan molla" are lyrics in a song) which was funny the first few times but she's been saying that for months now and it's getting pretty annoying tbh. 

I know I should say that it's bothering me and I've stirred conversations back to the topics again. To be fair I did tell them I'm just not that much into it anymore but maybe I should do it again? Like am I overreacting and just being overall to harsh?