how can i Protect boy in Love Marriage

I would be thankful for your advice.I am a muslim girl of age 26 years.I have completed my ME and presently working and am in love with my colleague of age 30years who is Hindu brahmin.We have kept our wish to marry infront of our parents.Our parents are not ready for our marriage as inter-religion and society issues.We dont want to elope and get marry but we are true in our feelings and want there blessings so decided to wait till our parents agree.My parents are black mailing me that they will harm the boy kill him etc if we marry against their wish or else if i wont agree to marry as per my parents wish.I dont want to hurt anyone and m sure my family is not such cruel but dont want to underestimate them as i cant bear small harm to the boy.Is there any procedure to protect the boy.I want to take precaution before sumthing happens