Is Aquaman married or even with Mera in New 52?

Thanks.

yes, they are married. It's covered in the first few issues of the new 52 aquaman.

@explodingpineapple: They live together, although she's engaged to another man

Yes. They live together. And Arhur even told Ya'Wara that he was a married man. Mera was engaged to someone from her colony, but according to her it wasn't by choice.