Robin: God, I wish last night never happened.

Barney: I don’t.
Robin: What do you mean?
Barney: What if this whole thing, it isn’t the story of how we both made a terrible mistake and ruined our relationships? What if it’s actually the story of how… We got back together?
Robin: Ok, I’m gonna ask you one last time. Is this what you want?
Barney: It’s what we both want. Why else are we rushing to tell them what we did? On a boat?! That is a terrible idea.
Robin: Barney, we tried this. And we failed. Why try again?
Barney: Because I haven’t stopped thinking about you and you haven’t stopped thinking about me.

Barney was the first person to take the chance and admit that last night was not a mistake but that it meant he really did still have feelings for Robin and even though it was hard he came clean with Nora about cheating! BUT Robin who was going crazy trying to get Barney back at the beginning of the season is the one who couldn’t admit she wanted to be with him just as much and she couldn’t even be brave enough to break up with Kevin and get what she really wanted!