Cause everytime she looks at the blue hair romantically, he drops her hopes to the floor. If he likes her too at least giving false hope is better but instead he kills every hope she had for him. They aren't match for communicating with each other. He is strange and she can't understand him, the only who can understand him is the readhead guy.
There is a time in the future when she tells him she doesn't like him to be faraway and stopping him to enter entertainment industry, he knows it too well and he answers her that he understand and will do as she says but in the next day he really enter entertainment industry and become an actor acting in romantic drama because he wants to try feeling romantic without even telling and explain anything to her
Isn't it kinda crazy all she does is look at the blue hair one romantically all the time, set up special meetings... etc and he's not the actual ML??? Like what is the purpose of making her lead him and all the readers on if he's not endgame? Lol