Not even family accepts
If you come from a traditional background then you must speak to your elders. You can't afford to break ties with your family and they know it.
Your arguement will have to be strong... yet polite.
If the relationship continues over a period of time then you have a chance to show them how serious the matter is.
Really, the same thing applies with your boyfriend's family.
Is there another member of your family in a mixed relationship ?
Is religion strict in your family ?
Have your boyfriend and family met ?
What was the reaction ?
..................................................................
Only answer what you want to answer.