There's a difference in defining who you are and what you are. Reyna realizes she could only choose one.
Sam and Dean don't talk about Hell. They don't talk about Purgatory or the Cage or a number of things that have caused them agony in the past. However, no matter how much they don't want to talk about it, life can have its own say in the matter. Rated T for swearing!
It definitely hadn't been Triton's idea to associate himself with Percy Jackson. It most certainly wasn't his idea to drag his tail to that snotty camp he lived at and bring the demigod to Atlantis. Gods have mercy; it was not his idea to get stuck at camp half-blood for two weeks. This was going to take a lot of getting used to.
Sam decides it is time to talk to Dean about Cas. Dean may be stubborn, but Sam can also be an awesome brother.
Dean finally killed Abbadon. So why aren't they celebrating? It could be the fact he doesn't want to let go of the blade.