this is going to be an unpopular opinion but after watching episode 9 I completely get why she broke up with him. marriage is not the end goal for everyone and she told him that earlier and he still didn't respect her wishes and did marriage planning behind her back. in addition, the lack of trust and anger he showed when dealing with that yu si situation is disrespectful and immature. yes obviously she isn't perfect but he was the problem too and she was justified in breaking up with him but also justified in mourning him and their relationship. there was a lack of trust and boundaries from him and she didn't want to put up with that but she obviously still loved him.
Yes, that's true .. I noticed that.