Cousins wedding dress is MY wedding dress

Leighandra Paige
My fiancé and I were supposed to get married in November, but due to finances, we've had to postpone it. After we announced that we were getting married, my cousin decided that she would get married this year instead of last year like originally planned, and of course I was fine with that. Before we knew we were postponing our wedding, I took my cousin wedding dress shopping with me a couple months ago, and fell in love with a gorgeous Oleg Casini gown. Literally crying as soon as I saw myself in it and everything you'd expect when you find the perfect dress. 
Today, I was not able to make it to her wedding. But her wedding dress is the dress that I fell in love with. I'm so upset and frustrated by this. If it was a stranger, fine.. But it was my cousin.. My MAID OF HONOR who stole my dress away from me after she saw how happy it made me, and I'm heartbroken.