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.
The Sk8 the Infinity manga has indeed finished. It provided a satisfying conclusion to the characters' arcs and the overall storyline. However, fans still discuss and re-read it for the great moments.
Definitely. The anime Sk8 the Infinity originated from a manga. The anime adaptation tries to stay true to the key elements and storylines presented in the manga.