I have no idea what to wear to this wedding; please help! ?

I think that they are all appropriate choices, especially for someone your age. I like the pink one best, as I think it will look best with the nude pumps. While the dress from Nordstrom is nice, it looks like something I would wear, and I will go out on a limb and say that at 22 you don't want to wear a dress that a 50 year old would wear. Also, I don't agree with the comment about the dresses being too short. First, they are just short, they are not crazy short and second, we don't know how tall you are. I am very short and all of those dresses would be knee length on me. Further, that is how young women dress. They don't wear knee length dresses.