Oh god I hate the MC so much. She agreed with him that her BF is not a good person. Like WTH, you're also not a good girl. If I were a guy, I wouldn't want to be with a super insensitive girl who keeps hanging out and on first name basis with a guy who confessed to her, left her boyfriend who was clearly in a bad mood and turned down his invitation for a date he's planned and looked forward to very much. Like hell! This girl didn't even say anything when people were badmouthing her BF right in front of her face in the previous chapter, saying he's a shitty boyfriend. Oh hell no.
And what did that guy do anyway? Sure, he's posessive, but at least would never anyone disrespect her GF and would not have a date with other people instead. He's the only one who's been tolerating her so far, and he's been so upfront with his shortcomings. Now I'm gonna say this upfront, WHAT A SHITTY GIRLFRIEND.