Marshall: You know what a best man does, Barney? He does what the groom wants. But all you ever think about is what you want, what's best for you. Best man? I'm not even sure I'm inviting you to the wedding at this point.
Barney: You don't mean that.
Marshall: Why should I invite you? You don't even want us to get married.
Lily: That's not true.
Barney: Lily, don't.
Marshall: What?
Lily: I'm sorry, Barney. It happened last summer when we were broken up.