Trouble With A Dama

Well, my quinceanera is like a month and a half away and so far i thought i was doing pretty good and i thought that i wasn`t going to run into any problems. Well, i just had some problems w/my chbalan soi`m not sure he`s going to be my chabalan anymore and my cousin (one of my damas ) is giving me a lot of trouble. First off: my chambalan. He`s my ex-boyfriend but we`ve always been like really close friends and we still have feelings for each other but recently my cousin (which is also the one i`m complaining about) has been telling me certain things about my chmbalan which is making me rethink him and he also acts very immature at times and i used to think that was adorable but now i don`t like it and it`s not a quality that i would like to have in my boyufriend (or potential boyfriend) anyways....i dunno what to do about that. Secondly: my cousin/dama. Now, with the dama`s dresses and performance outfits....i gave the damas basically all the control on that because i figured they`ll be wearing it and i want them to be comortable, i just told them what i did and didn`t like. Now my quinceanera is going to be a small af, so something very expensive isn`t neccesary (for their outfits). Now, i toldthe girls that they didn`t have to ear the same dress, i just wanted them to wera the same color. But they all (together....including my cousin) decided to wear the da. So i thought "hey cool whatever" now the day i`m supposed to go shopping with my damas my cousin`s mom (my aunt) calls up and tells my mom that she gfeels too pressured into buying my cousin (her daughter) a dress that`s really fancy and expesive. So i end up getting into trouble because i apparently pressure my damas into stuff. But anywayse truth is my cousin doesn`t have the guts to tell her mother what she wants so i get blamed for what my cousin wants. Anyways....there`s not only a dress problem but a dance practice problem. My critisizes everything and i mean everything and complains a dance practice. I even scheduled them so they werren`t inb the way of ANYONE`S previous plans. So, i love my cousn and i`m there for her but her attitude is starting to be too much and i`m seriously considering kickin her to the curb on this. But it would cause some serious family friction and i don`t want that. So does anyone have any advice on how to get out of this or at least ? thanks a lot