Help guys me...i am an afghan Girl?

I am Pashtun afghan girl, and in love with bangladeshi (guy from bangladesh it is somewhere near to Pakistan and india) he is a very sweet and polite guy... he is trying to learn Pushtu for me, he wanna go to afg to learn more lang. My parents don't know anything about him, they are very old fashioned and i afraid of them... i cant live without this guy and if i will not be with him i will never marry anybody else... by the way i am 21 and he is 22 and we both study... what u guys think i should do...should i marry him and escape or any advices..becous i love my family and wanna share mhappinesses with them too..