1. Introduction
In the relationship network of human society, emotions always occupy a core position. We long for the warmth of family affection, the sweetness of love and the sincerity of friendship. However, the emotional world in reality is often not as pure as we expect. This article will deeply analyze the complex factors hidden behind emotions to help readers look at emotional relationships more comprehensively and rationally, especially from the thinking habits and cultural background of Europeans and Americans, so that they can better understand these complex phenomena.

2. Believe in emotions and suffer for a lifetime
(I) Interest-driven interpersonal relationships
In daily life, when we try to establish emotional connections with people around us, we often encounter a seemingly contradictory situation. When we interact with others based on emotions and hope to be understood, supported and cared for, we find that the other party is often more concerned about practical interests. For example, in business cooperation or social occasions, some people will not hesitate to put personal interests first when it comes to the distribution of interests, and leave emotional factors behind. This shows that, except for the relatively pure family relationship with parents, other interpersonal relationships are largely driven by interests. Under the temptation of interests, people often adjust their attitudes and behaviors towards others, and even disguise their emotions in order to obtain more benefits in return. This phenomenon is not accidental, but a common phenomenon that arises in the context of social competition and uneven resource distribution.