you know I thought about this too, at ch 5 he said he was basically jelous and showing signs of love, he said he thinks he has a fetish for him but maybe I think it's because he has never loved someone before and can't tell the difference between fetishes and love, it might take him a while but if he lets Ryouji help him with that I'm sure they can built up to a happy and healthy relationship for both pats
And to think that Yuki is loving the vanilla sex with Ryouji. A good sign that he's in love with him.
i honestly don't see how this relationship is making them worse/unhealthy. You make it sound like Ryoji being unable to hit Yuki is reason he [Yuki] goes around getting into fights, but Yuki was self-destructive all on his own and only calmed down once he met Ryoji who can satisfy some of his masochistic desires (rough sex and occasional sex toys). Ryoji is definitely not making Yuki self-destructive, Yuki actually takes better care of himself because he knows Ryoji (and his mom) would get upset if he gets too beat up. The relationship isn't perfect at this point, but it's far from one fraught with issues.
And why does only Yuki get to have his sexual desires fully realized, but Ryoji who is not a sadist have to "put" up with only Yuki's preferences? I really liked the chapter during the school trip arc where Ryoji is like we will do it my way then your way. That is what a marriage of differing sexual preferences i think should be like compromising on who's way they get to experience
Thissss
Honestly I love them but their relationship isn't healthy. Yuki knows what he wants and Ryouji can't give him that which just leads to a self-destructive cycle that negatively effects both of them.