My GF's Parents have AGREED TO our marriage only if I get into Bits Pilani ! (SERIOUS)

I am speaking truth! Plz believe and help me My GF's parents have agreed for our marriage but the condition is I must get into bits pilani... actually we both were together until last year but she entered pilani campus last year (Electronics & Instrumentation) and I took Drop... Actually both of our families are quite open and yesterday her father told me that they have agreed to our marriage only If I get into BITS PILANI this year!!! plz help me i am very serious (January Mains score 91%ile) ,,,,What should I do? Help Me