During Chapter 10 the system updated to track the Harem members levels of affection towards the MC. Well, technically it is a relationship tracker so it does not only apply to harem members, but that's all he is using it for at the moment so this will be updated once he starts using it to keep track of others as well.
The relationship tracker status's are as follows:
Archenemy --> Hatred --> Rivalry --> Dislike --> Neutral --> Friendship --> Close --> Love --> Soulmates