Boyfriend buys a house for his parents. As a person who has never been married in the past, you shouldn't be stopped by reason, but you don't need to lend money for your boyfriend to buy a house for his parents. After all, you have never been married before, and then you should support it and not stop it. If you are stopped, your boyfriend will be unhappy, and his parents will know that he is filial, but on the other hand, the financial pressure on both of you will be even greater, especially your boyfriend. You should be financially independent and don't depend on others. At that time, you will be confident in your speech. You should also explain to the man that you can lend money to your parents to buy a house. It is natural for your son to be filial to his parents. I don't mind, but you will be under great pressure. I don't want to make you so tired. I hope you can think about it for us in the future.
Let your boyfriend see if he must help his parents get a loan to buy a house. Is there any other way or wait a few years? If he has made up his mind, you can only agree. Otherwise, if you object, two people are prone to conflict and quarrel. He's doing it for his parents. You can't interfere. If we quarrel over this matter, it will also affect each other's feelings, which is not worth it.
What most people decide is hard for others to change. We can only agree with each other's ideas without hurting ourselves.