1) it s better you get married under special marriage act wherein both parties maintain their separate identity
2) your fiancee need not convert to Christianity
3) if your fiancee is willing to convert you can get married in church
4) if both are adults they can marry inspite of parents opposition
5) your abs yiour fiancee affidavits that bothmarried as per own free will will help in case any false complaint is filed by the patents