Ya but he did take advantage of him and the situation, he also knows that Taeyoon is kind and would probably try and take responsibility. Eunho doesn't want him to be tied down, expecially since Eunho took advantage of the situation 5 years ago specifically to have the bun. Eunho also probably has an inferiority complex and feels he isn't good enough for Taeyoon. Once he finds out that the words Taeyoon wanted to tell Eunho that day was a confession, this misunderstanding will be fixed, but knowing Asian authors, it's probably going to be dragged out as long as possible
ok yeah he did take advantage but it wasn’t as if the guy didn’t want to screw him either sooo it kinda worked out for the dude even if he was in rut don’t get me wrong it was still wrong and also we have to understand that he was basically being abused by his dad ofc he’s going to feel that he wasn’t good enough but he still kept being strong and is where he is now thanks to all of that and the last part so true but it’s always fun to see what this authors add to the plot for drama

Instead on Eunho hiding the fact that is TAEYOON child... he could just tell him ?!?! Cause all he wants is someone to love only him and I’m VERY SURE Taeyoon would do a great job