'She'll do her religion a favour' - what exactly do you mean by that?
Why the hell should SHE convert? Why should she change her beliefs for a man?
OP I feel so bad for you
I know how you feel. At the end of the day, it wasn't mean to be. If he had realised this before then he shouldn't have let it go on for so long, that's just really out of order. Don't worry, you willl find another guy who will introduce you to his family (instead of having to hide you from them) and you won't have any of this constant hassle, it'll be a much easier relationship. Obviously now it won't feel like it, but don't worry you WILL find someone else, someone better suited for you