The triangular theory of love
by Robert Sternberg is based on intimacy, passion, and commitment. The strongest type of love, consummate love, consists of these three aspects. The idea of this theory is that love can consist of one component alone or any combination of the three parts: intimacy, passion, and commitment. 

There are many factors taken into account when a relationship turns into love. One big factor is culture. This is a common issue among two people who come from very different cultural backgrounds. In a study done by Phillip Shavers and his colleagues, they interviewed participants from different parts of the world and found that love has "similar and different meanings cross-culturally. The Chinese participants had several different love concepts such as "sorrow-love","tenderness-pity", and "sorrow-pity". This ties into another study done by Rothbaym and his partner Tsang in 1998 in which they researched popular love songs from American and Chinese artists. The difference was that the Chinese love songs "had significantly more references to suffering and to negative outcomes than the American love songs". This may be due to beliefs that interpersonal relationships are predestined, and thus have no control over love lives.

कारणे Causes
Mere exposure/exposure effect केवळ अभ्यस्तता/अभ्यस्तता परिणाम
आकर्षण = romantic relationship
पूरकता Complementarity