The end of a romantic relationship rarely happens suddenly, according to psychologists. Instead, it often unfolds gradually, marked by subtle but telling changes in behavior and emotions. Research in psychology suggests that couples often experience a period of decline before a breakup. A study published in the Journal of Personality and Social Psychology describes this as a "terminal decline," a time when relationship satisfaction slowly decreases and then drops sharply one to two years before the separation. One of the most reliable signs of an impending breakup is a "lack of commitment." When a relationship no longer feels like part of a shared future, it may already be fading in the present. Signs of this decline can be seen in everyday interactions. Couples may exchange fewer affectionate gestures, show less attention, or have less spontaneous affection. Love doesn't always vanish overnight, but it can erode over time. Seth Gillihan, a psychologist, notes a "lack of love or concern for the other's well-being" as a key indicator. This might show up in small ways, like not asking about someone's day or not noticing their efforts to make things better. Intimacy is often built on sharing thoughts, emotions, and doubts. When this sharing stops, a distance can form. Psychologists refer to this as "low self-disclosure"—the less one reveals, the less close the relationship feels. In such cases, the relationship may become more functional, focused on routine and practicality, rather than emotional connection. A common paradox is being in a relationship but feeling emotionally isolated. This sense of "low proximity" can be a strong signal that something essential is missing, even if daily life continues as normal. Two contrasting scenarios can also be revealing: either frequent, intense arguments that seem to go in circles, or a complete lack of conflict because nothing seems worth discussing. In both cases, the relationship may have become emotionally distant, no longer a dynamic space but a static environment. Thinking about other potential partners or believing that one could easily find someone else is another clear sign. According to Seth Gillihan, the perception of available alternatives weakens relationships. It's not necessarily about whether these alternatives exist, but about how they reduce the investment in the current relationship. One of the most subtle yet decisive signs is a decrease in relational investment. Relationships require time, energy, and attention. When these elements disappear, the relationship gradually loses its foundation. Psychologists call this "low relational investment," and it often predicts a breakup more reliably than conflicts themselves. These signs don't necessarily mean the end is near. As Seth Gillihan points out, many of these factors are not fixed. Relationships can change if both partners are willing to put in the effort. The real question may not be whether the relationship is over, but whether both people still want to try. The end of a love story isn't just determined by the signs, but by the choices people make in response to them.