Lol Xemphim, you are really picking all the juicy and important parts huh? Can't wait for our translations?
Just wondering, are you reading the entire novel yourself through Google translate? If yes I must applaud you. I always end up with terrifying but hilarious results with that thing.
Regarding the passage, what exactly are you not clear about?
To do a very general summary, 13th and Ruoxi are basically talking about 4th here. 13th basically explains to Ruoxi how 4th came to like her so much and how 4th's feelings are real. He also hopes that since Ruoxi has now promised herself to 4th, she should treat him well. 13th will not forgive her if she hurts 4th because of 8th.