Aragorn and Boromir, unrelated by blood but united in their love of Gondor, were the only two men who set out with the Company from Rivendell.
Boromir is not part of Isildur's bloodline or there wouldn't have been a steward for thousands of years. Denethor would have been king and his father before him both of which were not as they had no royal blood. Aragorn is the last living heir of Isildur and the last in the line of kings until he has his son Eldarion.
Boromir is the son of Denethor II and Lady Finduilas of Dol Amroth. He had a younger brother Faramir. A year after Faramir was born their father became the ruling Steward of Gondor, and Boromir became heir apparent, inheriting the Horn of Gondor.
The kiss is intended to be platonic, we assume, but that won't stop imaginations running wild about how such a scene would have been executed.
However, in this first encounter, Boromir moves beyond simple caution to potential disrespect. While the Council is in session, he never acknowledges Aragorn as the rightful king of Gondor; he only refers to the use of the sword of Elendil in the defense of the land.
In LotR Fellowship of the Ring, Aragorn kisses the forehead of the departed Boromir. This is a Gondorian gesture of farewell. (explanation in comments)
Because he knows that Aragorn is the True King and he wants to stay in power. He's only Steward until the King returns.
Boromir was the weak link within the Fellowship due to his desire to see it as a tool of warfare: glory and pride were its avenues to his heart. Over the months the questions and doubts grow, until the Ring had a gateway to influence him fully.
As Boromir dies, he tells Aragorn that he failed, that his kingdom will fall. He regrets his attempt to take the ring from Frodo and condemns his own actions. In his final moments, Boromir does not worry about his death, but rather the people he believes he has failed.
Like his father, he is "cursed" with Isildur's greed and is obsessed with the Ring. He believes that with the Ring in Gondor's possession, they could win the war against Sauron. He joins the fellowship so he could take the ring from Frodo and return it to Gondor but becomes attached to his comrades.
Yes, Sean Bean was Ned Stark in Game of Thrones and Boromir in The Lord of the Rings, but it's that meme that will outlast him, and he knows it. “For some reason, the parts I play, like Boromir or Ned Stark, have a life online long afterwards,” he told the Radio Times. "I keep seeing, what do you call them – memes?
Later, when Orcs overrun the scattered Company, Boromir makes a last stand, attempting to save Merry and Pippin from capture. He is killed by many Orc-arrows and dies with Aragorn at his side, after repenting for his attempt to take the Ring.
Aragorn is not half Elf, although he is a descendant of Elros, who is half Elf (and the brother of Elrond, the half-Elf who raised him), which explains why Aragorn's life span is unusually long.
It's a constant reminder to Aragorn of his family history; his hesitation to take the ring from Frodo Baggins (Elijah Wood) is a direct result of Isildur's corruption. Although Boromir ultimately falls victim to the seductive nature of the ring, Aragorn is able to defy his family history and resist his urges.
Arwen was a distant relative of her husband Aragorn. Aragorn's ancestor, Elros Tar-Minyatur, the first King of Númenor, was her father Elrond's brother, who chose to live as a Man rather than as one of the Eldar.
Aragorn was the heir to the throne of Gondor and of the lost realm of Arnor.
Grasping Boromir's hand as he dies, Aragorn takes his first real step toward claiming his birthright: “I swear to you, I will not let the White City fall.” With a look not unlike relief, Boromir responds in affirmation, “I would have followed you, my brother.
In the fight that cost Boromir's life, the horn was cloven in two. Aragorn, Gimli and Legolas laid it in the elven boat with Boromir and his weapons and sent it down the falls of Rauros. The two parts of the horn fell out of the boat, and were found several days later.
In The Fellowship of the Ring (2001), Boromir is the only member of the Fellowship who does not receive a gift from Galadriel. He does wear a belt throughout the film, but it is made of leather, not gold.
Boromir was put under great stress by his father to retrieve the Ring, and he let the Ring take control of his mind. Because of this, he is ashamed and disappointed in himself. This proves the Boromir is at his core a good person. Boromir knows what he has been thinking is wrong, and so he cries.
The short answer is that each of the gifts that were in the film played significant parts in the future movies whereas Boromir's gift had no future importance. In the book it was a "belt of gold".
Boromir was a great captain, and even the Witch-king feared him, but he was felled by a Morgul-wound and his rule was but twelve years.
Yes, he is described as broader than Aragorn, though of about the same height and indeed, Tolkien emphasizes his brute physical strength as he ploughs his way through the massive snow-drifts on Caradhras.
He had no heir, and so the stewards ruled in the place of the kings.