Um, have you even read the comic? She has never once directly stated that she likes him. She doesn't like that he doesn't realize that she has feelings for him. Okay, so if he doesn't know, then the obvious solution is... apparently to never once correct him and just expect him to read your...
Seconded. I've read a lot of LNs and manga, and sometimes yes, the guy is dumb. But 90% of the time, the girl is just expecting him to read her mind. Tsukuyomi has a CRIMINAL lack of awareness of how to speak to Hiyoshi, and lets her tsundere attitude take over. Hiyoshi's problem is honestly...