Robin: Barney, she got rid of all of her stuff for you.
Lily: Oh, I see what this is really about.
Barney: Yeah, mugs. Coffee? Tea? Eh, religion.
Lily: This is about the fact that you don't think this relationship is gonna last. That's why you don't want to throw anything out. Because when that inevitable breakup comes, you don't want to buy new mugs.
Robin: That's why I've never thrown anything out for any relationship ever. [to the empty seat next to her] Isn't that right, honey? Oh, that's right. I'm alone.