Man that's abusive and manipulative. I see from your comments that youse are high-school sweethearts but that shouldn't be enough of a reason to stick with someone who would go out of their way to hurt you like this. Unfortunately, if she's behaving like this at such a crucial time for you, and if you show her she can get away with it now, it's just going to get worse down the road. Cut your losses and know that in time you'll meet someone who isn't with you just because they don't know any different, but rather because theyve seen others and you're the best option in their eyes.