I understand how you feel we do want to fight our childrens battles but I dont think you can make other children be her friend because you think they should, it does sound unfair and I would feel the same way ,you have my sympathy, I do believe she has to do do it for herself, if these girls ignore her, so be it, it would be better if you let the issue go,could it be possible that you are talking about it . making a bigger issue than it may be if left alone.The screaming and argueing at home would be a good thing to focus in on,and fix what do you fight about,you say its killing you that she has lost her popularity perhaps you are seeing it the wrong way.My answer is leave her alone to sort it out,dont get so involved,work on yours and her relationship and stop yelling .at her .Good Luck