Sharing Our Innermost Thoughts

My friend invited me to the wedding of her sister but she doesnt live close so I had to take an airplane ticket in order to be there. Now, I am here and my dress is long and by mistake when I wanted to stand up and someone helped me because its long I stepped on it by wrong and a part of material broked. I was sad because my dress cost 800$ and I could not dance because of that . Here are 80 guests invited. After that I showed this to my friend and she said : dont panic its not visible. But I am not blind it broked 4 inches and I really can not dance because I see and for me is visible and extremely ugly. And I was at the table where we all should eat and my eyes were in tears only but I did not start to cry and she said : you know what, please stop this isteria right now , my sister told me that you are gonna hurt her wedding today because you are isteric and I told her no, but now you are starting all this… she added: you have to be happy because she will think that something is wrong and you are envious and you have to dance but try somehow to take the dress in hand or something … but I swear Im sure someone will observe and is ugly broked I really dont want to dance. She said you have to dance otherwise my sister will say that she knew it and I should stop the isteria. I did not do isteria I just had tears in eyes and said her that I dont dance now cause I feel ashamed. And she makes me feel guilty like I am always wrong, like something is happening and I am not normal like all the people and that everytime something happens .What do you think about her behavior? For me its sad because I payed for ticket , for dress that material broke and for gifts and now she said those words? Please let me know your opinion.Thank you