Love with Christian guy but my family is orthodox

hi .....i m in love with christian guy his family knows about our relation and they are ready to accept me ....but my family is very orthodox my mother knows about us and thats why she is angry andeven do not talk to me had ask me not to meet him and not to go to his house .....but still i meet him....plz tell me what to do my father doesn't know anything about this . they are searching match for me but i refused it so he said ok.Plz hepl me how can tell to my father about us convience him for our love mairrage.......we both love eachother a lot....