Legal analysis: the hospital must have signed this in order to find someone responsible. Under normal circumstances, immediate family members are required to sign the operation. If your immediate family is not here. You yourself agreed to have your friend or boyfriend sign it. So the hospital can agree. This only means that the hospital needs someone to prove that someone has signed it. So I think your boyfriend can sign for your immediate family. If it is a major operation, it is best for the family to come and sign it. After all, if something goes wrong, neither friends nor boyfriends can afford such responsibility.

Legal basis: Article 12 19 of the Civil Code of People's Republic of China (PRC). Medical personnel should explain the condition and medical measures to patients in medical activities. If surgery, special examination and special treatment are needed, the medical staff shall explain the medical risks and alternative medical schemes to the patients in a timely manner, and obtain their clear consent; If it is impossible or inappropriate to explain it to the patient, it shall explain it to the patient's close relatives and obtain their clear consent.

Medical institutions shall be liable for compensation if medical personnel fail to fulfill the obligations stipulated in the preceding paragraph and cause damage to patients.