Peace be upon you. To understand some opinions regarding the beliefs of the Druze, you can refer to the following link: [Some opinions on Druze beliefs](
https://www.islamq2a.com/1113/). According to Grand Ayatollah Khamenei (may Allah protect him): If they do not deny monotheism and the specific prophethood, do not reject any of the essentials of religion, and do not believe in any deficiency in the message of the Prophet of Islam (peace be upon him), they are not judged as infidels or impure. Therefore, if it is established that he is a Muslim based on what we mentioned, the ruling on marriage to him is as follows: Marriage to someone from a differing sect is not permissible if there is a fear of danger to her beliefs or if it leads to corruption. Source: Special inquiry. According to Grand Ayatollah Sistani (may Allah protect him): The criteria for infidelity and Islam, based on which purity or impurity is judged, are mentioned in the practical jurisprudence. As for identifying the status of the Druze, it should be referred to experts. Thus, if it is established that he is a Muslim, the ruling on marriage to him is as follows: A believing woman may marry a non-hostile dissenter in a permanent marriage, albeit with dislike. However, it is prohibited if there is a fear that the marriage may lead to deviation in her beliefs or prevent her from fulfilling her religious duties according to the Imamite sect. Source: Office of His Eminence in Lebanon + [Minhaj al-Salihin, Vol. 3, Issue 215](
https://www.sistani.com/arabic/book/16/867/). May you be successful in all good.