Thanks for your thoughts/advice everyone. My fiancee intervened and suggested that she and I take a good bit of time apart to cool down and maybe we can discuss this better when we're not angry and emotional.

I don't know what her deal is/was and since I have less than zero desire to talk to her at the moment, it'll be awhile longer before I find out why she went off the deep end, but when I do I'll update you all.

Thanks for bearing with my stupid, emotional ramblings.

BTW, Cataholic, both my fiancee and I are 25 (we'll be 26 in May, him three weeks before the wedding and me, two weeks before). She's also 25 and will be 26 in April.