Well, I think that this happens to alot of brides. One of my best friends, who got engaged a year after me, decided to have her wedding the day after mine at home in Michigan. At first, I was a little upset...mostly because she can't be at my wedding and I can't be at hers. But the truth is, I am just happy she is happy. I would bet that she will get over it. With time, she will come to realize that you didn't pick your date to make her mad, you picked your date because it is what you wanted. And you, just like her, should be able to have your wedding on the day you want.