to be fair emotional intelligence is different from academic intelligence
This. Some people even have their emotions suppressed so much that they start to lack empathy and everything. It seems more like it was a foreign emotion to him. He's not used to wanting someone that much it seems.
Yes of course, I realise that. What I mean if that he's not emotionally intelligent when it comes to himself. He knows enough about emotions to manipulate Nakyum's feelings for Sir Inhun, to understand Sir Inhun's feelings of inferiority and desire for power. But when it's him, yes he's unused to feeling this way but he can't even identify what he's feeling!
You know it just sorta hit me that for how well educated Seungho is, he's actually really stupid. And lacks self-awareness. "I don't know why I'm so angry", he says. He doesn't understand that it's actually jealousy. He doesn't understand that he's envious that Nakyum reacts positively in a sexual situation with his learned sir but screams no when it's him. He doesn't understand that this bothers him because he wants Nakyum to enjoy being intimate with him. He doesn't understand that he feels this way because he has feelings for Nakyum. Boy just doesn't understand!! My god. #－.－)