IA. I think both she and Barney were using the term "messed up" a bit lightly. As in, they both have complicated emotional issues and bizarre lifestyle needs that people other than themselves wouldn't really understand or be able to accommodate. She's fine being like that around her more typical friends, but sharing her whole life with someone normal? I don't think she could ever do it, and I don't think many normal guys could do it. That's partly the reason she and Ted broke up - they loved each other to death, but they could never have given each other what they needed because they couldn't wrap their minds around the other's personalities and desires, no matter how understanding they tried to be. She and Barney, on the other hand, pretty much read each other's minds, and they'd each be able to roll with the other's messed-up-ness because they understand on a personal level what it's like.