This is based off of the flashback in Trilogy Time. Just Robin's inner monologue. Enjoy.
Robin listened to the conversation as Ted, Marshall and Barney prepared to watch the trilogy again. "Barney, where do you see yourself in three years?" She heard Ted ask. Barney's reply was like a stab to the stomach. Sure, she wasn't the most romantic of people, and that summer had been just sex, but he had supposedly been in love with her. Surely that counted for something. And yeah, it did hurt. It hurt a hell of a lot. Because if that's how he saw their future, why were they even doing whatever the hell it was they were doing? And sure, maybe it was because he was scared. That would of been Lily's answer, she was certain of it. So, when she knew nobody could spot her, she reached out and smashed a lamp. She listened as the boys discuss what had happened, and allowed herself to laugh at Marshall's predictions. But it was still in the back of her mind, nagging away. That's all he was to her, a hookup. And she tried not to think of how he was her best friend, even though she'd always say Lily was, or how he knew her better than anybody, because that got them nowhere. Later that night, he had tried to talk about it. But she turned over and pretended to sleep, just so she could avoid the conversation.