i think if you love this man, then you should marry him. it sounds as if he is a much larger source of support in your life than the objecting family members. if your family loves you and cares about your happiness, they will come to terms with your decision. it seems to me that you care more about this man than the approval of family members. i dont know your family, however, even if they do not approve at first, they may come to accept your decision especially if this man is willing to convert religions.