Future Ted: [v.o.] Kids, I'll never forget the first time I told your mother I loved her. It was a rainy day in New York. We just had a horrible lunch. The movie we wanted to see was sold out, and I just looked at her and said, "I love you." It was a big deal for me. I hadn't said that to a girl since...
[flashback to Ted and Robin on the roof:]
Ted: I love you, Robin. I'm serious. Do you remember why we broke up in the first place? We asked each other,
"Where do you want to be in five years?" And our answers were just too different. Well, it's five years later, and where are we? Standing on the roof where I kissed you for the first time. I know this is a lot to process, so no pressure here. Just... what do you think? You know what? You're exhausted, it's late. Let's just go to sleep. Well, good night.
[later that night, Ted is in bed alone:]
Ted: [inner monologue] What the hell was that? Okay, I can fix this. I-I was just temporarily insane because of my Lyme disease, which I got on a camping trip that I didn't tell her about because... I go camping in secret. Perfect. Or I could say, "I'm sorry, we're great as friends. Let's just forget I ever said anything." Yeah, that's probably better. Okay, here goes.
[Ted gets up and opens his bedroom door. Robin is already there.]
Ted: I go camping in secret.
[Robin kisses Ted]