First, calm down.
Second, it's bc she knows her friend well and she knows his dating history and how homophobic he used to be so she's shocked (which is understandable). If you read the chapter well you'd understand that she cares abt the situation(on her own way). Her homophobic and womanizer childhood friend started to fuck and date a man ? Ofc she'll be surprised and start to question his honesty. It's understandable.
She knows him, she knows how he's (she used to sleep with him too) so she has a reason to act like that.
i literally said that i get where’s she’s coming from but that still pmo idc even if she knows his history and how he used to act in the past you can obviously tell he’s serious about Garam plus not everybody acts the same way they used to in the past… Jaehyuk has had a lot of character development and is way better than he used to be and just because she’s used to sleep with him doesn’t mean she just has the right to diss his relationship with someone else and suddenly start lecturing him on what she thinks is right.
She isn't dissing, she's caring on her own way of his relationship because she knew him. You can see that she cares about Garam because when Jaehyuk talked about him to her he didn't said beautiful words. She wasn't updated and she had the right to doubt him
the girl just pmo so bad like i get where she’s coming from because of how Jaehyuk used to act in the past BUT ASSUMING OFF RIP without really knowing anything that he’s just playing with Garam and basically shit talking their relationship and saying they shouldn’t be together is crazy…. simply because he used to mainly go for women LIKE WHY IS SHE UPSET THAT HE FUCK AROUND WITH A LIL DICK IN BOOTY??!!