They both are in fault because lack of communication. Min never correctly confimed with the Mc(forgor Mc name) if they were dating, so Min assumed. The Mc doesn't want to express those feeling because he thinks he does not deserve Min and tries to detach those feelings which is not helping cause he's actually does love her. I will say the Mc is going to look like an crazy ex （￣へ￣）
she did confirm, she ask him and he didnt hear her
Thats not confirming if the other person did not hear. . .once again she assumed
he about to crash out when it’s all his fault lmao