Responses
Just because one person has feelings for the other, doesn't mean they can't have meaningless sex, as long as they establish that it's just that, and that they will never date. If the person having feelings agrees to that knowing damn well that he will get hurt in the end, it's on him. He's a grown up, he can make decisions for himself and nobody need to walk on their tiptoes so that his feelings don't get hurt
Why are y'all on the Seme's side? The Uke made it clear from the beginning that he will never love him and that it's just sex. The Seme is the one that can't accept it and keeps hurting himself because of it.
At least the Uke wishes for the Seme's happiness, and that's why he lied because the Seme needs to get over him and find someone who will like him back.
The Seme doesn't like the Uke, he only wishes to possess him (yandere type). "If you ain't happy with me, you shouldn't be happy at all!"
The Seme is toxic himself!