Why does ophelia so quickly break her promise?

Ophelia quickly breaks her promise to her father, Polonius, because she is caught in the emotional turmoil caused by her relationship with Hamlet. Despite her initial commitment to obey her father and distance herself from Hamlet, her deep feelings for him override her promise. This conflict highlights her struggle between familial loyalty and personal desire, ultimately showcasing her vulnerability and the pressures placed on her by the men in her life.