In the first episode, when Rachel comes into Central Perk in her wedding dress, she explains to Ross, Monica, Joey, Chandler, and Pheobe about how she decided not to marry Barry. I was wondering, if Monica and Ross were already such good friends with Rachel, why weren't they invited to her wedding? It was something that I noticed, because they always talk about how good of friends they have been since childhood, and how they all grew up on the same block.