I think the main reason Stefan is so hellbent on finding the cure is because he still feels guilty. I think he still blames himself for Elena's vampirism to an extend and he wants to make things right. But while he's being single minded about it he has overlooked some things like Elena probably making peace with being a vampire. I think to some extend he also feels helpless because he cnt be there for her either since he has trouble with being a vampire himself. So I think these are some of the reasons he wants to find that cure. But at some point I think he's going to come to terms with that. That maybe the cure doesn't matter after all.
Idk, at the moment pretty much everything about SE is ruined. At least Stefan during his ripper phase had moments when he reflected on Elena. Even when he was at his meanest he still got affected with Elena to an extend. But now when it comes to Elena, nothing,I mean it's like she's totally changed. So I wonder how the writers will change those dynamics. Elena's 360 leaves a lot to be desired.
@Liza, true, the Klefanoline thing presents quite an interesting dynamic. Klaus has this liking and respect for Stefan and they always have these boy talk moments together lol. While with Caroline Klaus' playful side comes out. If written well Klefanoline has a rich storyline without the romance.
@Charlie, I feel you. I was also miffed about Delena going to the Lakehouse because it's sort of like a place with Stelena memories. And so much hate for Caroline, at the moment Caroline is Stefan's only friend and I can't forget all the stuff Stefan did for Caroline when she turned. I was actually disappointed in S3 that Caroline was not there for Stefan during his ripper phase because the writers just glossed over that. But I'm happy their friendship is ressurected, it's one of the pure friendships in TVD.
I have no problem with Elena's sex life really. I'm just annoyed with the way they handle Stefan's character. He's been there done that and so has Damon and Klaus but they still flirt with women. It's Stefan who's becoming assexual actually.