Goodbye My Princess

I recently began watching a Chinese drama called Goodbye My Princess (Chinese: 东宫; pinyin: Dōng Gōng). It is based on the novel Eastern Palace by Fei Wo Si Cun; starring Chen Xingxu, Peng Xiaoran and Shawn Wei. It aired starting February 14, 2019 and ran until March 25,2019. It tells a story of a princess from a foreign land who has to marry the crown prince for political reasons.Peng Xiaoran plays Xiaofeng, the beloved ninth princess of Western Liang, who enters into a political marriage with Li Chengyin, the crown prince of the Tang Dynasty, played by Chen Xingxu. The latter has his own favourite concubine, and only agreed to this loveless marriage to secure his position as heir to the throne.It is later revealed that Xiaofeng had met Li Chengyin under the alias of Gu Xiaowu three years ago. He was on a secretive mission to conquer the western kingdoms, and used Xiaofeng to accomplish his goal. After finding out the truth, Xiaofeng jumped into the River of Forgetfulness, and Gu Xiaowu / Li Chengyin followed suit out of guilt, and perhaps also love. In the present-time, only Xiaofeng has regained her memories, and their heart-wrenching romance begins all over again. My dilemma now is that a friend who watched this in real time posted comments about the finale without warnings of "spoiler" and I now know the ending of the drama. In the past I have watched movies based on real life and ones based on books that I have read and watched knowing the ending but wanting to still see how the depiction of the story would unfold and do judge how well it matched with my ideas of the story. In this case I have not read the book and have been forming my opinions right along with the episodes as they aired for me. I am only at 15 of 52 and had to pause now to digest the information as to the ending and decide to I want to continue watching to that conclusion.