Does Octavia Stay with Ilian?

Eventually, Ilian and Octavia are the only ones left in the med bay and Ilian tells Octavia that he's glad she survived. Octavia warns Ilian that he will be killed soon as "blood must have blood".

Did Octavia and Diyoza get together?

Octavia and Diyoza are not a conventional couple. For all the audience knows, they never had a romantic relationship.

Does Octavia have another boyfriend?

Along with the rest of Clarke's friends, Octavia chooses to return to human form in order to live out life on Earth alongside her new boyfriend Levitt.