Mikusama

I don't think so. I feel like he misses his brother. The older brother does seem to be keeping a lot of secrets from his younger brother. I know a few chapters ago we got flashbacks where the older brother talked badly about him and he heard it. I think he just didn't want his brother to be treated the way he was so he took the burden because he loves him. I personally think he wanted his brother to be free of his parents.

I'm sure he misses him and I agree about the parents.

I just think there's still some cockblocking mixed in. Because he really doesn't need to live at the hospital for two weeks to look after his brother. I don't dislike his hyung, I know it's coming from a good place, but he really needs to realize his little brother is a grown ass man who hit the jackpot finding a hot, rich and devoted partner. So he should support them instead of being a pain in the neck. Lol

I think there's also some part of him that still sees his younger brother as a kid

I would like to add, u know he probably got trauma being the perfect child for his parents and probably develop a brother complex so more than separating with his bf he wanna shelter and have brotherly moment with his bro. As said by doc that mc was characterized as a five year old he want to be closer to his lil bro who distanced himself out of no where ( mc over heard his bro talking bad so mc probably distanced himself while the bro didn't got any closure )
So when things will smooth out with his brother it will all go back to normal just a plot point .