No, Galadriel was not fooled by Sauron when he came disguised as Annatar to Eregion; she saw through his deception, recognizing his evil intent and rejecting his offer to help the Elves, though other Elves were swayed, leading to the forging of the Rings of Power. While she didn't fully grasp his connection to the One Ring initially, her wisdom and foresight prevented her from being fully duped by his fair guise, unlike some others.
Galadriel is still an elf at the end of the day, and Sauron is a Maia. Sauron is stronger than her. Eru is the in-universe equivalent to the biblical God and is the creator of everything. There is no comparison.
When he finally meets Galadriel, Sauron is in an emotional state where feels cynical, aimless, unworthy and undeserving of anyone's care or admiration, let alone love (platonic or romantic). That's not something he has experienced since he was Mairon.
Rather than cast magic at Sauron, Galadriel opts to challenge him on the spiritual plane; she resorts to her Wrath form to penetrate Sauron's mind and break his will. She obviously succeeds, as Sauron audibly cries aloud as he flees.
In ROP, Galadriel is tempted not merely to join Sauron but to participate in his redemption. By binding him to the light and allowing him to bind her to power, they could rule over a Middle-earth they have rescued together: Halbrand: Together we can save this Middle-earth.
In the late First Age, Finrod and Galadriel came to Doriath as guests of Thingol. There, Celeborn and Galadriel met, fell in love, and were soon betrothed. Galadriel remained in Doriath with Celeborn after Finrod went to the Caverns of Narog to establish the stronghold of Nargothrond.
The Ring's effects
Inversely, the hobbits' good-naturedness and lack of ambition makes them less susceptible to the Ring's promises of power, as in Frodo and Samwise Gamgee, who are able to handle the Ring for extended periods of time.
In 2850 Gandalf entered Dol Guldur again, but this time in secret, and discovered the Necromancer was Sauron. But Saruman stalled and delayed, meaning the White Council did not agree to an attack on Sauron until 2941, during the events of The Hobbit.
She was most likely the most powerful elf still in middle earth. In the Two Towers after meeting Aragorn and company, Gandalf responds to one of their questions with this: “And so am I, very dangerous: more dangerous than anything you will ever meet, unless you are brought alive before the seat of the Dark Lord.”
The relationship between Gandalf and Galadriel in Tolkien's world was based on deep respect, friendship, and spiritual connection, though there are no indications of a romantic relationship in the books or films.
His father was a man (Eärendil) and his mother was an elf. He was given a choice: to live as a mortal man or an immortal elf—and he chose immortality. Earendil wasn't a man, he too was half-elven, and so was Elwing, Elrond's mother.
Indeed, it seems Elrond used this The Rings of Power kiss not to admit his true feelings for Galadriel but so that he could slip her a pin from his cloak.
In their prime, Gandalf the White is more powerful than Galadriel. Gandalf, being a Maia spirit, belongs to a race of powerful divine beings called the Ainur, who existed before the world was even created.
We know that Elrond, Elendil, Gil-Galad, Cìrdan, and Isildur were enough to beat Sauron (although he had been weakened by the fall of Nùmenor).
Glorfindel was among the mightiest Elves, and once the lord of the house of the Golden Flower in Gondolin. After a valiant death in the First Age, he was re-embodied by the Valar and returned to Middle-earth millennia afterward.
It's not the years; it's the mileage. Gandalf isn't a Maia in the same way Sauron is. He was sent to middle earth as an old man, so his body is much more real than Sauron's “raiment”. He can't use his power to the same extent, he can't change his forms at will.
Despite his status among Sauron's servants being similar to that of the Nazgûl, the Mouth of Sauron was a living man whose early history was largely forgotten.
As a Maia, Gandalf was an angelic being in human form, in service to the Creator (Eru Ilúvatar) and the Creator's 'Secret Fire'. He took on the specific form of an old man as a sign of his humility. His role was to advise but never to attempt to match Sauron's strength.
It's possible that Gollum's prolonged search for the ring allowed it to maintain a significant power over him, suspending his aging process. In contrast, Bilbo's exposure to the ring's influence waned after he willingly (mostly) relinquished it, allowing his aging to resume more noticeably.
Tolkien's description of Gollum conforms to a Catholic – and Thomistic – account of envy, which is a “sadness of the soul”; and it is Gollum's unbearable sadness and his unquenchable desire for the one Ring that marks his character.
Instead, we have to consider that Sauron, the original owner, is not human, but has a quasi-divine status. Therefore ownership of the Ring is subject to Divine Law. With this precedent in mind, many of the ambiguities clear up nicely. After numerous transfers by violence and trickery, Frodo is the true owner.
Tauriel follows the dwarves after they escape. Legolas also loves her so he follows her after they close the gates. She takes care of Kili in Lake Town. Legolas doesn't like to see that they are falling for each other so he calls her away to go to Gundabad.
Gimli loves Galadriel - he later describes her as the most beautiful woman in the world - but they are not *in* love, and I'd say it's a compliment much like calling your lord the strongest or wisest person in the world - beauty is her primary attribute, and so he's praising it.