I feel so bad for you, because I know what it's like to want your parents' approval, (not due to religious beliefs in my case, but for other reasons). Are you in a position that you could move out on your own, because that sounds like about the only thing that you might be able to do now. If you are afraid of what your dad will say, you KNOW that at some point, your mom will HAVE to tell your dad, and that's when the other shoe will drop. (and maybe fly across the room and hit you in the head, like my mom did me--and that shit HURT!!)

Are you working at all? Could you and a few friends get a place together?? At least then, you could have some time to sort out your relationship with your parents, without the fear of being disowned, or put out, (which seems like what you might be afraid of. I would be). I don't know a lot about the Muslim Faith, even though I have a few relatives who belong to that Faith. I know in a lot of families that DO practice it, that the dad makes the rules, and they must be followed, or else. PLEASE be careful, and if you can go somewhere til things get sorted out, do it soon, so that your mom isn't stuck with this "secret" for too long. Good luck!