Have to confess though I'm finding it really difficult to get my head around "dating" again..
Wake up, she's walking all over your face and her actions are clearly grounds for removal. I'd suggest that you let her go now or suffer later..
But it is also true that you need to consider the obstacles that you may face. You are both young and if this relationship flourishes, are you willing to convert? I seriously doubt she will. Are you willing to support her, her you in a society where her faith/custom may be looked down-upon? If not, don't go any further..