That is one thing I agree on,josh does need to sort this out,why do you think she treats you this way,if it were me I would have it out with her,and get to the bottom of the problem ,and yes you should not let one person ruin your special day,is there more to the story,are you telling us everything,don't mean to sound rude,but I am puzzled that a person could be so hateful,if it is jealousy,or simply she does not like you,then she needs to get over it and move on,and josh needs to support you on this,it is very immature behavior on her part,hope you can get it sorted,and your day is everything you want it to be