Restraining self for loving a wrong person

they said that a person can restrain herself/himself from loving someone who is forbidden to love. just like when you find out that a man/woman you liked is married. At first, you will feel regret but gradually, the attraction will stop getting worse. His responsibility to others is the reason you can no longer continue to love him. But first there is the existence of the principle you follows. When your stance is right and there is a fear of doing wrong, even when the attraction overflows, it is overcome by the principle you believed.