Communication wise there is no truth and lie: there are cognition tools and influence tools which we teach to differentiate.
Let’s take the trivial “I love you”, not as an abstract statement, but as the one pronounced by a definite person. Is it information on the situational emotional state or a thoughtful logical conclusion? Why is this information provided? What is the purpose of it? To influence? Yes, that’s it, but what kind of influence is it? To make someone happy? To create and strengthen emotional bond? To add responsibility? To turn one’s eyes aside? Is it a product or a packaging for some other product?
It seems to be cynical, but how can we approach it otherwise? We know that the more significant the word is the stronger it suppresses the ability to reason in the situations when this ability is especially important.