@ghostt
She has never expressed that she was better or that she doesn't care about others, she is probably too preoccupied with her own feelings and problems to even care.
She is wrong in not telling him but she will sooner or later apologize for this mistake.
She never said he wasn't worthy, are you assuming these things or did you actually see an indication of this?
I get that she is weak minded and that she is doing something morally questionable, but who cares how they started dating? They get along and when this is revealed, it will probably have them thinking things through but eventually they will get over it because they enjoy each other's company.
Again, I acknowledge that the start(her getting blackmailed into asking him out) was wrong, the journey(the date itself) not so much.
Let us just wait and see, these ares just the first few chapters.
The bully is the real piece of shit here, don't forget that in your disdain for the heroine.
I seldom like weak minded characters, but I also don't dislike or hate them, they have room for development.