Yolohy
This was a very good opportunity for Xander to do some introspection. Reexamine his life and the way he's treated Tang Yue and the other people around him. Instead, we got to witness Tang Yue's brains melt out of her ears. Xander simply hasn't earned a love confession at this point in the story. He's done absolutely nothing to earn her trust or her affections. In fact, he's done a great deal to reaffirm her distrust of the man. He suddenly spouting sweet nothings and confessing to knowing all her secrets should have made her even warier of him. Especially after learning that he had been toying with her for weeks on end with that child disguise.