i actually love that a lot, it gives it a good balance of fondness and sadness and i'm a total sucker for those types of lines, i'm not gonna lie! maybe they had both become so used to being apart that they didn't know how to be together anymore and with everything he was going through it was just no longer an option for them, maybe they ended as friends but both pretty heartbroken over it all which is why they feel so awkward, because it's impossible to share that much of your life with someone and go through big things like that without still feeling something. maybe with leo having moved to seoul a few months ago she could have been really awful at keeping up contact with him in recent times, but they could run into each other again when he moves into the building and try to catch up and see if they can get their friendship back