Responses
He repeatedly showed how nervous he was with realizing his feelings, realizing that he didn't rly feel like marrying a girl and having girls, that what he had then was good enough for him. He got jealous of Kise, he was thinking about this too, he tried telling him "I love you" but take shut him up with a kiss. Please, re-read it, we can see how his feelings build up through the work, it's just not "direct", it's a show rather than tell, and it builds up naturally through little things, so it might not be obvious, but it is clear.
Idk if it's the translator, but on my side of reading things it didn't even seem like the uke wanted to be with him and was just stuck being with him then when the seme wants to leave now all of a sudden he's in love with him. I did not feel the love out of thisn