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I need help searching for a yaoi manga.

So the uke is older than the seme, he's short, looks younger, and has short blonde hair. The seme is younger, but is taller, looks older, and has long black hair. They go to the same college and were neighbours (I think) for a while before they moved in together.

The uke at the beginning talked about how he gets easily jealous and he was worried that he'd get jealous in his relationship with the seme and potentially ruin everything like he did his last relationships. The seme is kinda possessive of the uke, too. There's a chapter where the uke goes to the gym so that he could get more stamina, but the seme finds out and beats the crap out of the uke's trainer because the trainer assaults (or tries to) the uke.

There's this chapter where the uke's brother stays with them for a while
because he was worried that his parents would disown him for being gay. The chapter has these kinda gross scenes where the brother would watch the uke and seme have sex.

Does anyone know what this manga is called? Because I've been trying to find it ever since the website came back up, but I can't find it anywhere.