Fact is that you will have to live with her for another two months. If you don't find a way to make up, those two months can and will be very long. Sometimes you have to admit you're wrong, even if you know that you are not. It is a tough thing to do, but probably the right thing to do in this situation. Your priority number one should be to make the situation liveable for the next two months.
Personally, I will take a lot from my friends, life isn't always about having fun, and even friends will hurt one another, sometimes completely unintentionally, or in the heat of the moment when something goes wrong. But there are limits, even to friendship. Last year, I had to 'drop' one of my best friends, as she hurt me beyond what I thought possible, and I might never find out why, but cutting the strings of a close friendship was one of the hardest things I have done in the past few years.