you might want to try psyche delico's choco strawberry vanilla manga. it has 3some tho. the story goes with uke confessing his love to seme but seme can't leave his childhood bestfriend behind everything, like this is a cute type seme which has a childhood bestfriend that is part of him and can't separate from him and even SHARES everythin with him. so since seme is like that, uke has to put up with seme's cruelty!!! seme even gave the childhood bestfriend permission to have sex with uke. i was like "ASFDGHJKL WTF YOU ARE SICK AND THE HEAD AND SO INSENSITIVE LIKE... REALLY BITCH?!" oh and since i'm recommending psychedelico, you might want to read her other works like it made love and hate the world at the same time lol
Color Recipe by Harada definitely falls into that description. Harada wrote another one too where the seme uses his friend's guilt of an accident that happened while they were kids to get him to always stay around him and tend to his wants and needs but I can't remember what the name is right now. Tourou no Ori by Psyche Delico also somewhat involves that sort of scenario because the butler uses his master's feelings subtly without him noticing much.
I wanna read some manga were the uke is being used by the seme. It doesn't have to be anything in particular like sex, anything that involves the seme aware of the ukes feelings and takes advantage of them is fine. Anyways, the uke has to eventually leave him, but the seme doesn't want him to because he realizes he loves him, and makes him stay. It's alright if the uke rejects him or not, I don't mind! Please help my fujoshi friends! ε=ε=(ノ≧∇≦)ノ