I agree with both Val and Grondy.
I wanted to add though that even if it may seem that Frodo takes Sam for granted and Sam does all the cooking, etc, I think you also have to put some weight in how much the ring was affecting Frodo. It was draining him from resitance, power of will and energy. And the longer Frodo had the ring, the weaker he became, on all three spots. I think Sam understands this, since he has also carried the ring for a little while, even if not to its full extent. So even though Frodo may be Sam's master and Sam Frodo's servant, I think that both Frodo and Sam realises that Frodo hasn't got the power to go find food or do stuff like that. Frodo has to save his powers, as he knows it'll only get worse the closer they get to Orodruin and Baradúr. He also has to trust his own heart, as he was assigned this quest and not Sam. The only thing Sam can really do is to support Frodo the best way he can, and he does that throughout the book. And like Grondy said: Sam got Bag End from Frodo when they came back, and even though Bilbo didn't get quite as much gold so that he could fill big tunnels with it in The Hobbit, like the rumours has to tell, I think that there lies a big fortune just by owning the estate.
Sure, he is right about Gollum being up to something, which he is, to lead them into Shelobs cave. The question is if that really was Gollum's motive or the motive of the orcs/Sauron? Either way, Frodo knows that they will not find a way into Mordor unless they follow Gollum. He also remembers that Gandalf said that Gollum still has a part to play, for good or for bad. I'm guessing that since Gollum helped them out of Emyn Muil and over the dead marshes and to the black gate, Frodo is hoping that he will help them some more and not lure them into any trouble, as he hasn't so far.
So.. No, I do not think that Frodo takes Sam for granted. Like Val said; their relationship changed and Sam became a shoulder for Frodo to lean upon. They aren't really described as master and servant when they get home, it seems more like they are good friends. Sam is busy with his family and planting trees all over The Shire and Frodo is... well, probably mostly longing for Valinor and the grace of Valar.
"Always forgive your enemies; nothing annoys them so much."