If you are a good friend of a boy, and you are a boy, then I think you should not persuade him to let go, but rather persuade him to withstand the pressure and work hard to fight for it. As the saying goes, it is better to demolish ten temples than break up one marriage.
If you are a girl and you still like that boy. Then you should spend more time with him and enlighten him. Maybe he'll turn his attention to you.
If you are a girl and the person involved. Then I think what you should do most is not to persuade him, but to reflect on yourself. Seriously ask yourself, is it worth letting go because of your parents?
This time they let go because their parents didn’t like each other.
Suppose you meet a boy again in the future, and your parents liked him at first, but then suddenly don’t like him, and you are both married. Do you think you will divorce him or not at that time?
Just wake up, the people who will accompany you through the next life are not your friends, nor your parents, nor your children. But your significant other.
Love or marriage will always encounter many difficulties and difficulties. When we encounter them, we cannot blindly avoid them, but we must bravely accept the reality and solve the difficulties.
If you can’t solve the most basic parental issues and just avoid them blindly, what use do you think you can do?
Have you ever thought that one day your parents introduced you to a man, and you knew nothing about that man, so you got married, and on the wedding night, you had sex with him? Do you feel like you are being fucked?
Love is something you can control yourself. It's very simple if your parents don't accept it, just do your best to do your ideological work.
After all, he loves her and she loves him.