So few days ago I was casually listening to music and this song stared playing and all I could think about since then was how perfectly HarryKim vibe this song has for me.
I believe that after everything Harry went through, even given his high sensitivity and emotionality, he seems likely to just have a lot of doubts and be afraid of another disappointment and potential heartbreak. Given that he decides to quit drinking and become more capable of taking care of himself in general terms, that fright won't be without cover. Another story like the one with Dora would probably just break him completely and he will just go down without any hopes for ever coming back. Especially, knowing how emotionally distant Kim can be.
(There are some scenes of my post-Return headcanon, I am thinking about publishing this as a full story, but I cannot decide if I want to make it as comic or fic series or a mix of everything, so maybe one day)