Romantically, she's getting closer to Vaughn. But she is really growing closer to Will. He has proven to be a good friend. She can open up to him much more. Their friendship is growing alot more. Syd knows that she can confide in him. In a way, he's safer to talk to than Vaughn, because Vaughn could report Sydney (like in ATY). But Will is there to provide comfort, as Vaughn is, but in a different way.