Shen Biran's feelings for Gu Qingyuan are something even she herself is questioning.
Her doubts are not without reason, because events like today's happen for a reason too.
Only when these things really occur, can Shen Biran have these thoughts, and indeed, she can't manage these issues.
If she could think of a reasonable way to handle the problems, she wouldn't be in her current state, but she finds herself unable to tackle them, and is even more unsure of how to deal with them.
When problems arise, Shen Biran's first thought is to protect Gu Xiaonuan, so that Gu Xiaonuan won't get hurt, but then he reflects and comes to the same thought, is that not the reason behind his actions?
Moreover, after thinking about these things, he naturally has the same thoughts. When he contemplates his feelings for Shen Biran, he reflects on so much.
Gu Xiaonuan always tends to affect Shen Biran's mood at such times, and he cannot remain as he is now.
