Idt It was just about jealousy. It was abkut breaking trust. She trusted jin-ah to be a good friends to her, but at the end, jin-ah chose to destroy her friendship and her relationship. Shes probsbly pissed off because she still loves her, but can't digest the fact that jin-ah could hurt her like that. If in high-school, jin-ah stole her boyfriend, then in the present, whose to say what will happen? If somebody stole my boyfriend (yes, my boyfriend would also be at fault here), I think I would be more mad at her because she not only took away my relationship, but violated the rules of friendship. I would be PISSED off.

Grown ass woman btw… I so feel like she had a bunch of bad relationships with other women that said disgusting things to her denying any feelings of love towards the same gender and that’s what made her full of internalised lesbophobia and now she’s projecting all those insecurities on the one that was essentially her first love… Like, she probably had no idea she acted the way she did out of romantic jealousy, and assumed it was a “this boy stole my friend” situation but then they KISSED and the floodgates opened, but I am going to bet that bitchass mean friend said mean biggoted things to her that made her clam up and not think about what she was feeling towards Jin-ah and that’s how their relationship got this way. Maybe this bitchass friend was even an ex situationship, idk, she was too mean to Jin-ah so maybe it was jealousy.