Time is the best healer, I think it would come out weirder if his feelings were resolved quickly, because aside from his anxiety, he is now also questioning his ideals and what he thinks is the right thing to do. Thats not an easy thing to change.
yes, ur right, that was the only thing the author did right. but in those chapters of him worrying, nothing really noteworthy happens (yet there has to be at least one sex scene per chapter....). also, i felt like it was resolved so stupidly, with an ex deus Machina cuz if that ring box hadn't rolled out accidentally, he would continued being silent. it was like the author decided she met her quota of silent suffering and decided to be done with it without giving him actual chara growth.
much of the angst was about mc's anxiety, which isn't a bad conflict perse, but felt like the author prolonged it longer than it should be, filling it with sex scenes and such. it was mostly resolved when mc found out about ml's intention to propose... like, that easily.