castelo - Episode 2.21 - antro, den of Thieves - Press Release 

What I'm thinking is that they'll play around with Kate having someone else, and we wont see Castle and Kate Show their Love until mid Season 3. Not at the end of season 2, But I think it's a great way to keep viewers.

i bet u season finally love is in the air

I truly enjoy the interaction between Beckett and Castle but I think I’m going to have to miss the shows that have them dating others. I know the writers and creators want to keep us “interested” or as they say avoid the Moonlighting curse but it gets old, being dragged around waiting for a couple with chemistry to get together. Its tempting to want to go away for a while and hope the show stays on long enough for them to make it that far. And yet I hope CASTLEFAN1 is right in saying that "love is in the air" for the season finally. Then again, I've watched TV too long to hold out that much hope. I guess I just don't want to be disappointed. Here's hoping.