My girlfriend is emotionally blackmailed by parents..help..?

we two have been together for 1 year..both of us love each other more than anythng..we were planning to marry but all i need was some time,,as i had a very imp exam to write in last september..so,we decided that as soon as exam is over we wud get things done..her mother knows me,and knows about us..i have talked to her mother a few times,and felt she is a good person..but since september her parents ,mainly father started forcing her into arranged marriage..even my gf was unaware of all those things going behind her,,as her father has fixed up everything,,and arranged the guy he knows for years to marry her..i tried to convince her father,but he has gone insane or what i dont knw,,he said anyhow her daughter should get married before the end of this year..and told her that now even if i want to marry her in one month,means in november then also he wont let me do.bcoz he has fixed up everythng with the other guy and cant be cancelled and forget about getting married in next year...then me and my gf planned to get married secretly and planned to do registration and all in a few days..as her mother seems to be little supportive she asked her opinion on this idea..but her mother also betrayed at that moment and said my gf "if u ever think of that boy(me) u will see me dead" or somethng like that,,and her father also said her same thng like "if anythng bad happens to me u will be responsible for that",,"if you have ever loved your parents forget him"(me)..after this my gf stared crying for 2-3 days,,she is completely broken down,,as she has no way left,,i am completely devastated,,dont knw what to do!! as she loves me loves her parents also,,and doesnt want anythng bad happens to them bcoz of her,,she is asking me to forget her...she is supposed to ger married november 22nd with the guy her father wants ...plzz help,,somebody!! i am 24,,hindu from india