For my story ES and YD still see each other around due to having the same friends and because JeGuk group works closely with Zeus. Also, they hear of each other through the grapevine with the network of friends and family; however, they aren't as close as they were before, especially with YD's "break-up" with her. Remember he said not to acknowledge each other when passing each other by. Over the years it went from not acknowledging each other to at least just greeting each other at functions or gatherings, but they have not shared an intimate get together since that day of the break-up.
But, with YD's mother's influence he begins to soften, which you saw a bit of, with him finally letting ES back in.
Glad you like it sis Mandy! Hope your back feels better soon