i was okay with jaehyuk until he told her "that doesnt even suit you"

Right! He has no right to interfere since he’s dating someone. I’m sure he senses Donhee’s feelings for him... maybe not... but if he likes her, then tell her. Otherwise, support her relationship just as she is supporting yours. That’s what friend do!

If you like her then you should put a ring on it!
゜ﾟ･*┗(^◡^ヾ) (ヾ^◡^) ┛~(^◡^)~┗(^◡^ヾ) (ヾ^◡^) ┛*･゜ﾟ･*