I too am pretty frustrated that maya still hasn't told nemu that he loves him. However, I have a feeling that the mangaka may also be doing that on purpose so that when he actually does say it it will be during a really significant and emotional time in their relationship and that the impact of that confession will be huge.
I also have the same theory about Maya's confession. I mean when I re-read the manga I noticed that there were two scenes that Maya almost confessed his love to Nemu however because he was being interrupted or shy about it he was not able to do it. Same with you I have a feeling that it might happen in a very significant phase. I don't want to think about it but it might happen in a very emotional setting.
There should be a chapter where we get to see why and how maya fell in love with nemugasa and what he did before that day where he tricked him into cheating. I REALLY AM CURIOUS OF HOW IT HAPPENED!!! am i the only one who wants to know (•○•)/
Like a backflash into the first time he was interested in nemu and if there were other ways that he thought of to get near my nemu♡♡♡♡♡♡♡♡♡♡
http://www.mangago.zone/readmanga/hidoku_shinaide/tr/manga/hidoku_shinaide/v04/c019.3/pg-9/