It wants us to go back...

Watched the episode again and found some interesting things. First, Hurley was part of the Locke camp after the division, we know that Kate and Jack made it off, so this means there was either a reintegration of the two camps or something else went down...

I also found this last conversation between Jack and Hurley very interesting, where (as Sam and Walead informed me) they were playing HORSE in the mental institution gym...

Hurley "you're checking to see if I was gonna tell... if I was nuts"
Jack doesn't answer
Hurley "sorry... I'm sorry I went with Locke. I should have stayed with you"
Jack "It's water under the bridge man"
Hurley "I don't think we did the right thing Jack. I think it wants us to come back..."
Jack "Hurley..."
Hurley "... and it's gonna do anything it can to--"
Jack "we're never going back"
Hurley "Never say never, dude."

The it is what interests me... quite possibly it could be the island itself.

Why is it so important to keep a secret regarding other suvivors, appart from the Six? This would back up the claims that the Boaties (thanks wawa) either own or are co-owned by maybe Mitelos who wants to keep the island a secret, perpetuating the lie of the 815 wreckage reported.

Hurley had two opportunities where he could have indicated there were other survivors: the Ana Lucia question at the beginning, and holding his tongue even when Abaddon clearly mentioned he was aware of the situation by asking "are they still alive?"

Little tid-bit I noticed in the mental institution: There is a drawing on a green chalkboard of a tropical island with a palm tree, shark, water, and a little boat while the convo occurs.