Like, Jaehwan, if you have lingering feelings for your old flame (to the point where to hide your past and lie that you're just meeting a 'friend', and ignore a meeting with your actual bf to take care of this 'friend' and then lie to your bf AGAIN about who you were with) just BREAK UP with Dongho. It's unfair to him that he's thrown himself whole-heartedly into this relationship, and you're still chasing after someone else.
Like, Jaehwan, if you have lingering feelings for your old flame (to the point where to hide your past and lie that you're just meeting a 'friend', and ignore a meeting with your actual bf to take care of this 'friend' and then lie to your bf AGAIN about who you were with) just BREAK UP with Dongho. It's unfair to him that he's thrown himself whole-heartedly into this relationship, and you're still chasing after someone else.