Sternberg's Triangular Theory of Love proposes that romantic relationships are composed of three components: intimacy, passion, and commitment. The balance of these components determines the type of relationship.

Avoidant attachment is characterized by a fear of intimacy and commitment. Individuals with this attachment style tend to be emotionally distant and may have difficulty forming close relationships.

Convergence is the process of gradually becoming more similar to one's romantic partner. This can occur in various aspects of the relationship, such as attitudes, values, and behaviors.

Assertive communication is characterized by openness, honesty, and a willingness to share thoughts and feelings. It involves expressing oneself in a clear and direct manner while respecting the rights and feelings of others.

Love blindness is the tendency to idealize one's romantic partner and overlook their flaws. This can lead to unrealistic expectations and disappointment in the relationship.

Social Exchange Theory suggests that romantic relationships are maintained through a process of social exchange, where individuals weigh the costs and benefits of the relationship and decide whether to continue or dissolve it.

Divergence is the process of gradually becoming more different from one's romantic partner. This can occur in various aspects of the relationship, such as attitudes, values, and behaviors.

Passive communication is characterized by a lack of assertiveness and a tendency to avoid expressing one's thoughts and feelings. This can lead to resentment and dissatisfaction in the relationship.

Self-serving bias is the tendency to attribute positive qualities to one's romantic partner and negative qualities to oneself. This can lead to an inflated sense of self-worth and a lack of accountability in the relationship.

Rusbult's Investment Model suggests that romantic relationships are maintained through a process of investment, where individuals consider the costs and benefits of the relationship and decide whether to continue or dissolve it.

Accommodation is the process of gradually adjusting one's behavior or attitudes to match those of one's romantic partner. This can occur in various aspects of the relationship, such as communication styles, values, and interests.

Manipulative communication is characterized by a tendency to manipulate or control one's romantic partner. This can involve using guilt, shame, or other forms of emotional manipulation to get what one wants.

Positivity bias is the tendency to perceive one's romantic partner as more positive than they actually are. This can lead to unrealistic expectations and disappointment in the relationship.

Comparison Level Theory suggests that romantic relationships are maintained through a process of comparison, where individuals compare their current relationship to their past relationships or to their ideal relationship.