Bridzillas

Ok so my best friend is getting married in about 24 days and I can barely stand to be around her. She is stressed yes but she is just so rude to everyone. Including her soon to be mother in law who is paying for 90% of everything. She has became a Bridzilla for sure. Is this how everyone is? And does it make me a horrible friend for not wanting to be around anymore than I have to be. Keep in mind that I am the maid of honor so I have to be around alot. I just use my "customer service face" alot. After a whole day with her I feel so physically and mentally drained it's unreal. Planning this makes me never want to get married ever.