This is a long story but I need advice...
I orginally asked my future SIL to be a bridesmaid when we first got engaged (Oct '16) because I considered her a friend and her and my fiance are VERY close siblings. From the get go, she has made it seem like its a pain in her butt to be in the wedding. She first threw a fit because she wanted to walk with a certain groomsman(she has a crush on him), and we told her that wasn't the order.
She has since made it very clear that she is not my friend. She is one of the most selfish people I have ever met. If it's not her idea or something she wants to do, she refuses. She is 25 but has the maturity of a 16 year old. She has basically treated me like garbage since the day we got engaged but I haven't said a word because she will be family. I supported her emotionally and financially and let her move in with me when she got kicked out of her apartment right after my fiance deployed for 14 months and have continuously just put up with how she treats me.
She made no attempt to save money for her dress($120) so her brother(my fiance) bought it for her. Then the size she ordered didn't fit and she threw a fit about needing to exchange it for a bigger size. We finally got her to allow US to send it back and order her a new one. Well the new dress finally came in last weekend and we asked her to try it on. After several nice attempts at asking her, my fiance finally insisted because it's honestly too late to get a new one. She blew up on both of us, saying how we think we are better than everyone and are horrible people, that we expect everyone to do whatever we say when we say it, blah blah blah...basically the worst things I have ever had said to me EVER. I got teary eyed because I was so mad but trying to bite my tongue because we were at their mom's house for Mother's Day, she then went on about me being a cry baby. Basically it was a horrible experience.
I don't think I can have someone stand up with me after treating me like that. Our wedding is in less than 2 months. I want to feel loved and supported and she clearly doesn't. What do I do? I know she's going to be in my life forever but after that, neither my fiance or I really want her in the wedding. He is leaving it up to me. The dress has to be sent back by Friday to get a refund and she hasn't made any sort of attempt to speak to either of us since then. I'm at a loss, broken hearted and hurt, HELP!