Dude, (or dudette)

I think you are reading too much into it. I think Hurley was just being polite and truthful. I mean if you had spent months cooped up on island with Jack, Kate, and random smoke monsters, you would probably enjoy a break from all of them. I actually agree with Hurley's sentiment. Now as to why they go to the tombstone, who knows. Perhaps Jin is forced to give up his life in order for Sun to make it off the island, something I don't doubt he would do.