Hindu Muslim Marriage

I am a hindu girl (age 26), I am in relationship with a muslim girl (age27) since 6 years, he stays in saudi arabia. Now he has come to vacations for 5 months now we are intending to get married. we tried all the ways to convince our parents. His parents have somehow accepted us and asked to get married after an year so that he completes his contract and get settled back in India after a year. Now my mother has went into depression and has tried to commit suicide but somehow we have saved her, she was hospitalized and then my father has complained to police n has put burden on us. So for time being my fianci has given statement in police station that we will separate. Now my father is trying to spoil his family name n trying all tricks to separate us. He says that he will take help of RSS and separate us. So now I am worried that my dad will not let us live happily even after an year after getting married. so kindly suugest me the best solution. also suggest me what is the probability that he could place a case on us in future. what cases he might put against us? how can we deal with this?