Lying to protect another's feelings

As I am sitting here blogging I am also watching a television show called "Jane the Virgin." In this episode one of the main characters had kissed someone else even though she has a boyfriend. In the beginning, right after the kiss happened she had planned to tell her boyfriend about the kiss. Once the opportunity presented itself to tell the truth her boyfriend had finally said the words that she had been waiting for "I love you." After hearing those words the character decided that it would be better not to tell her boyfriend about the kiss in order to protect the feelings he has for her and to protect herself. This is not a direct lie but it is a lie by omission. This lie is working so far because her boyfriend is choosing to ignore the signs that something is wrong and is cooperating in order to keep their relationship the way it is.