Boromir is the first of the Friends of the Ring to leave the group. Remember Amon, he is killed in battle with the Uruk Hai in Hen.
At the end of Lord of the Rings, Frodo and Gandulf go to Valinor or to the West.
(That's where the film ends.) Okay, what happens to the rest?
Sam raises a small family in the Shires. Not much, a small family of 13 children.
Sam became the mayor of Shire 7 times. After Rose's death, Sam also gets the opportunity to go to Valionr where Frodo went.
Aragon dies in the 120th year of the fourth era. Arwen dies a year later.
Merry and Pippin marry two beautiful Hobbit women. Anyway, they also lead a good family life. Merry and Pippin leave the Shire after both their wives die. They spend the last days of their lives in Gondor. As a respect for both of them, their tombs are built next to Aragon's tomb.
Gimli establishes a new kingdom in the Glittering Caves. (In the mountain caves behind Helms Deep.)
After Aragon's death, Legolas goes to Valinor with his best friend Gimli. (To the West) He becomes the first Dwarf to visit Valinor.
In this way the 4th age of the middle earth is passing. With Gimli and Legolas leaving Middle Earth, all of the Friends of the Ring had left Middle Earth.
All the elves are slowly leaving Middle Earth and moving to the West. The time of men is dawning.
You won't regret going to Valinor. Frodo, Sam, Gimli, Bilbo lived there and died in less time. Because only Elves, Maiar and Valar live forever in Valinor. Death is a gift to humans from Illuvatar. No one can change that. After death goes to the hall of Mandos. Then their fate will be decided.