What makes a relationship haram?

A relationship is considered haram (forbidden) in Islam primarily when it involves actions that contradict Islamic teachings, such as engaging in premarital or extramarital sexual relations, or fostering relationships outside the bounds of marriage. Additionally, relationships that promote sinful behavior, lead to temptation, or distract individuals from their religious obligations can also be deemed haram. Ultimately, the nature and intentions behind the relationship play a critical role in determining its permissibility within Islamic law.