According to the law, the down payment before marriage belongs to personal property, and the repayment after marriage belongs to husband and wife property. At the same time, the law also stipulates that if the property purchased by one party by borrowing before marriage has been converted into the joint property of husband and wife, the debt arising from the purchase of these properties is the joint debt of husband and wife.

According to the situation you described, your boyfriend borrowed money from his family to pay the down payment before marriage, which belongs to his personal property before marriage. However, if the registered name of the house is you and your boyfriend, and it is converted into joint property of husband and wife, then this part of the loan will also be converted into joint debt of husband and wife. If you don't want to bear the corresponding debt, you can choose to write only your boyfriend's name, and the loan can also be borne by your boyfriend alone, but in this case, the real estate can only be owned by your boyfriend.

At the legal level, rights and obligations coexist. If you want to obtain the ownership of the house, you need to fulfill the corresponding obligations. Otherwise, there will be potential legal risks. I hope my answer can help you.

legal ground

Article 18 of the Marriage Law:

In any of the following circumstances, it shall be the property of one of the spouses:

(1) one party's premarital property;

(2) Medical expenses, living allowance for the disabled, etc. Obtained by one party due to physical injury;

(3) Property determined to belong only to the husband or wife in the will or gift contract;

(4) Daily necessities used exclusively by one party;

(five) other property that should be owned by one party.