Is it valid for a girl to marry a man without his parents' approval, and is his marriage to her considered disobedience to them, knowing that her father refuses her marriage without his parents' approval, and is it permissible for her to marry without a guardian in this case?

For a marriage to be valid, the woman's guardian must be present. The approval of the man's family is not a condition, but it is preferable to consider their satisfaction. A Muslim man and woman should protect themselves from becoming attached to someone who is not their spouse and avoid unlawful seclusion. The questioner should distance herself from the causes of attachment to the suitor, frequently perform the Istikhara prayer, strive to lessen the intensity of her love, draw closer to her father, apologize to the suitor's family, prepare herself to be content with Allah's decree, and ensure her orphaned daughter is raised according to Islamic principles.