Fan Qianshi was triggered. With his fists clenched, he decided to look past his concerns and told her how he truly felt, "I will never stop pursuing her unless she is married to someone else. Even if she banishes me, I will still come back to her and stick around stubbornly."
Wu Qianyan was dumbfounded. Gu Xijiu, on the other hand, was starting to get distressed by him. After weighing her decisions, she chose to leave right away.
…
"I will never stop pursuing her unless she is married to someone else." His words kept playing back in Gu Xijiu's head, pushing her to come up with a solution.
He was the only disciple that she ever had, so his complete banishment was not an option.
Moreover, banishing him would not solve the problem at all as he seemed very determined to pursue her, regardless. Killing him was not an option, either.