Do I really have to go to my brother's wedding?
Why don't you want to attend the wedding?
Well, my family is a really boring bunch, so many questions. My brother doesn't even want guests to the wedding and he's a total brat.
It doesn't matter if your brother is a brat, you should be present for such a big life event. He may be just stressed from everything going on, so you have to forgive that and give him all the support he needs. You might regret not going on this day since it will only happen once.
I'm going to be leaving the country anyhow. There's nothing going on in that day.
Usually family members support each other by attending important events. You should think about how this will effect your relationship with your brother.