Think of what is best for the girl. If I were you, I would have the sheikh speak to the girl’s parents on your behalf first before you do all of this, explain your situation and let it be known you are making your own decision in this case without your parents wishes. Let your intentions be known through the sheikh that is acting in place of your family and that this is your decision alone and customary traditions will not be followed through by your family. When your parents do find out, they will likely pull all help from you, and may even give you an ultimatum between staying with them or leaving the girl. Lets say it all works out with the girl but your parents want you out of the house for embarrassing and going against their wishes, can you survive without them ever helping you and can you financially take care of yourself and the girl, and hire an immigration lawyer? This is a very delicate situation, the best way to go about this is if the sheikh and his family come to ask for the girl from her parents on your behalf and explain the situation to the parents, the girl you love has her whole life with her parents and giving the whole story to them to decide what to do and what they think is the most dignified way of dealing with this offer. Inshallah everything will work out for the both of you. May your love for each other last a blessed eternity.