Do Marin and Gojo get together in the manga?

Nope, Marin and Gojo don't end up as a couple in the manga. The manga follows a different narrative path for their relationship, concentrating more on other aspects of the story and character growth.

No, they don't. The manga doesn't show them getting together.

Not really. They don't end up together in the manga. Their relationship doesn't progress to that point.

No, they don't. There's no such scene in the manga.

No, they aren't. There's no indication of them being in a romantic relationship in the manga.

No, they aren't. There's no indication of them dating in the manga.

No, they aren't. There's no indication of them being in a romantic relationship in the manga.

No, they don't. Their relationship doesn't progress to that point in the manga.

Marin does confess to Gojo in the manga. It happens during a crucial moment when their relationship reaches a turning point. The confession is filled with honesty and vulnerability.

Not sure. You might have to read the manga carefully to find out.