I can't remember the name of the novel and I lost my bookmark but the setting is in ancient China and the main character was a spoiled noble who started to fall for his instructor and I remember reading a chapter in which his heart starting aching/racing when he looked at his instructor? His teacher knew about his feelings and seems to be avoiding acknowledging them. It's all I can remember, it's not much but hopefully someone can help.
I know it isn't much to start with but actually!! I found it It's called Slag Shou Cultivating Manual