Man... at this point, I think he needs to confess, and ask Qaiowen what she wants. Why is she spending so much time at his place? Does she not get along with her partner, or not want to be with her partner? The current situation doesn't seem good or healthy.
She basically helped raise him. They were together for so long that they are practically family.
It's also why he couldn't just confess and try to move on. If she were just a friend, then it'd be easy... but even if they aren't blood related, they were family....
It's as I've mentioned in previous chapters, she has no consideration for him whatsoever it would seem. She cares about him but he seems less like a person and more like a safety blanket. And the problem there is that he is younger and dealing with plenty of his own issues and she is only compounding it. Whether he wants her there or not, it's not good for him for her to continue as it is. Eventually it'll rip him apart like it's slowly doing now.
He's not just a safety blanket... to her, he literally IS family. In 90% of cases, people in his situation wouldn't fall in love with her....
Me and my friends all had older childhood friends that were with us like sisters... and all of us thought the very idea of dating them would be gross (though we did admit they were objectively hot)..... but we honestly were more attracted to the cousins we barely met than those girls who were always with us....
Qiaowen is technically being "normal" for a girl having a healthy relationship. Normally when you're in a relationship at that age you'd be still attached to your family to some extent and either still staying with them or visiting them regularly, with your interactions with your partner being regular dates or other ways of sharing time together temporarily. So if you look at it this way, she's basically just "living in her family house" while "dating someone normally". The problem is that this isn't a normal situation and her surrogate little bro isn't really her family. Her trying to force-recreate her familiar surroundings is the source of everyone's pain.
But this also is kind of a normal situation. If our boy by chance just didn't fall for her, they would actually have a normal healthy relationship.
It's also why he feels he can't confess.... because without the feelings, she really would be his sister, even if they aren't related by blood.
And she was actually a great older sister to him. She had the pride and love any good older sister would have towards their little brother.
And he KNOWS that he's blessed to have such a great older sister...
It's why he hates himself so much and why he can't escape... because even though she's not blood related, she really was an amazing older sister...
And that's what makes both confessing and cutting her off so hard.
If he doesn't confess or cut her off, he's going to suffer heart break.... but if he does, he loses one of his most important family members and might even personally damage it....
It's a conflict where he's forced to choose between losing his mental health or losing his most important family bond.
No matter what choice he makes, he loses something irreplaceable and will have scars for life.
His real best choice would be to actually lose his feelings for her while never letting her know.... because the other 2 options would both be terrible for him...