For a story to work the characters always have to be advancing toward a goal. Even thought they suffer setbacks, they have to be moving forward.
So here’s what the TVD writers did: they let the characters advance – Damon and Elena had sex! – and they immediately added more complication. Wait, Elena is sired to Damon? Does that mean she doesn’t really love him?
Here’s what I think is going to happen. Elena’s feelings for Damon will prove to be real, and she is no longer going to be the one doubting their relationship. Instead, Damon will worry that Elena is only acting like she loves him because of the Sire bond, and Damonwill be the one moving away.
Damon finally has the one thing he most desperately wants … and he’s going to take it away from himself.
And that is some fine fucking drama. The people writing this show? Know what the fuck they are doing. Delena fans now have hope: Elena and Damon both realize they love each other, and they even acknowledge that fact with tasteful nudity! But there’s still conflict: now Damon is unsure that he’s right for Elena.