Obi-Wan and Anakin had a close friendship and considered each other brothers. According to Obi-Wan, he and his former student are fairly close and everyone is aware of that. As the Clone Wars dragged on, Anakin and Obi-Wan continued to fight in the name of the Jedi and the republic until Skywalker's fall to the dark side, leaving others to believe that their brotherly friendship was damaged beyond repair (including Obi-Wan and Anakin themselves) until Anakin died saving his son, becoming a Jedi once more.
History[]
Despite being best friends, Anakin and Obi-Wan had a rather strained relationship when the former was still Obi-Wan's Apprentice, where Obi-Wan and Anakin both know they were trying to hold their promise to Qui-Gon. However after Anakin became a Jedi Knight, their friendship improved and they considered each other equals. They often banter with one another that some like Ahsoka were often seen smiling as the two went at it with each other. However, Anakin became furious with Obi-Wan when he faked his own death to go undercover to thwart Dooku's plan to kidnap Chancellor Palpatine without telling his former apprentice. Despite the incident, they remained friends up until the final days of the Clone Wars, when Anakin became the Sith apprentice Darth Vader to Darth Sidious. This heartbreak Obi-Wan felt caused him to fight Anakin on Mustafar, where he left Skywalker for dead. After learning his former friend survived and Padmé's death, Obi-Wan decided to watch over their son, Luke by taking him to Tatooine and watch him from afar.
Vader and Obi-Wan meet each other again on the Death Star nineteen years after their duel, where Kenobi allowed his former apprentice to strike him down. Even after death, Kenobi believed his former friend was irredeemable until Vader died and was reborn as Anakin to save his son.