Yes, in many fanfictions they do get together. Fans often explore their relationship beyond the platonic one shown in the show and develop romantic storylines for them.
In 'A Marriage Story', they do end up getting back together. Throughout the story, we see them go through a lot of ups and downs. There are intense arguments and bitter separations, but in the end, their deep - rooted connection and love for each other overcomes all the obstacles and they reunite.
In the manga, Langa and Reki do get together. Their journey is filled with challenges and growth that eventually lead to them being a couple. The author does a great job of building up their connection.