Galadriel's intentions.

[Lathriel]

I think Aragorn was constantly changing his mind about going to Minas Tirith. I don't think he decided untill Amon Hen where he would go.
I don't think Galadriel had much control over that. She could give the fellowship hints and warnings but since she was not completely involved she couldn't actively make the desicions for them.
Also as was said in the first book, "Do not go to the elves for council,for they will say both yes and no."

So I guess I'm trying to say that although Galadriel gave them hints she would never openly have revealed her intentions behind her actions.Plus that in the end it was still the fellowship who would make the ultimate decision.