Talk to your future mother-in-law and father-in-law

After reading what you said, your parents-in-law are not very easy to get along with. They are not married yet, so they ask you for money or something. If they get married, they will ask you to help them pay back the money, just like you said. But like the one upstairs said, you can move out. Since I love my boyfriend very much, I won't let my boyfriend and his family turn against each other. Find a more appropriate way to convince them. If you can't convince them, you can make it clear to your boyfriend and his family before you get married that you don't have to pay so many debts for them. Don't affect your feelings for these things. It's really not easy for two people to get together.