I don't think you payed attention....
He did not cheat and get married,he lied about it to break things with the uke because he thinks he is not deserving to be with him.
Then break up naturally then. Isn't betrayal more painful than a natural break up? Plus those are just excuses . It's just a matter of if you want be with someone or not. Uke chose him but he was betrayed. Saying something like holding him back or bein undeserving of such a person is only a sadboi fucking excuses. A relationship can function as long as both want to be together. Careers are unrelated to their relationship.
Fucking shameless ex dared to show up like it was nothing and used him as a model? Fuck never have I seen such shamelessness. Like you were a cheater and still have the nerve to show up ? You were in a relationship and dared to get married!?!??!? To lecture our seme about making uke happy!?!??! fcking piece of shit!!! Being buddy buddy with uke you sick fuck!?!??!