She looks at him and she feels like she sees a reflection of herself.
Two broken souls looking to escape the burdens of the world, tired of the fakeness and needless expectations from everyone around them, yet she would feel like they couldn't be anymore different.
For her selflessness makes her never want to abandon anyone even if it means sometimes losing herself for the people who matter most, but him, his selfishness took control over him like a dark cloak blinding him of reality, a reality where it could be filled with happiness and he'd be surrounded by the love and comfort he's longed for for so long.
However, he chooses to stay in the dark, become a taker without giving back, abandoning all sorts of people to remain alone thinking it's better, easier if you wish to say. Thing is, both of them don't know that their different paths have the same ending of feeling lonely, even though she might not feel it as often as he would it still doesn't change the fact how they both have wrong approaches to life.
Question is are they Yin and Yang? Answer: Yes yet do they complete each other? Answer: No.
Without realizing it, their wrong and different approaches also cause them to drift apart like a silent earthquake separating the continent and creating multiple lands.
It's true somehow they are always drawn back to one another yet you can't deny the outlines of the borders on the map, that thin line separating them, telling them they need to step up to pass and be one, though their stubbornness and melancholy will prevent them from uniting those lands.
Yes, unfortunately it's one sad story but it's their story.