Feeling unhappy- best friend is a hen-night-zilla !

Sorry,peeps I just wanted a self-indulgent whinge. Ever since I asked my best friend if she would like to organise my hen night, she has turned into some sort of Dictator ! I ended up so stressed and unhappy on sunday afternoon,I was in tears. I thought I was the one who was supposed to be a bridezilla?? Now I just feel like saying cancel the whole thing,I can't understand her attitude. She basically lost her temper and had a go at me because I asked her to try and cut costs on the amount she wanted to spend on balloons, she went on this whole rant about " I need to organise this my way and in my timescale and I'm not skimping on decorations to organise a s**t arsed party with S**t decorations and horsemeat sausages !" etc etc - I know, it sounds funny now . I was just saying that if we could save a little money on the decs,there would be more to spend on food/drink. We're having a Hollywood themed party in our local-at the MOST we'll have 30 hens there...the initial list she made was £200 just for decorations-not including buffet supplies or food. Everyone's putting £10 in a whip so they will expect to get fed and watered,but if too much is spent on balloons (why do we need 40?) ,then there is less for the other bits. She's acting like I'm interfering and being a nuisance, but at the end of the day,I'm the one paying for it. It's just taken the edge off it all for me now, and I was so excited about it ,now I just feel thoroughly fed up .