I can understand the way you feel and the guilt that is kept inside you and will stay there forever. First of all I can understand the attitude of your family by preventing you from seeing that Pakistani man. They felt that there is something wrong with this him. How can he propose after three months of knowing you. It is unrealistic period for proposition.
Men sing and sing well.
He probably proposed to many girls before. All what he wants is sex and only sex. On the other hand you have not enough experience in life to know that this man is a phony. I mean knowledge that could be obtained from books, friends, or family. We Arabs like to listen to our fathers and mothers regarding how to choose your spouse.