You and Finnick were secretly dating. You had both been chosen out of the pot. Well, he volunteered for your little brother.

You guys never announced your relationship public because you're afraid of what they'll do. However, everyone shipped you guys anyway

He would've married you in a heartbeat if it wasn't for the secret relationship. He loved you, and you loved him. Willing to fight for each other in the Quater Quell.

It was now the interview, Caesar, was questioning the others until it was yours and Finnicks turn. 'Now district 7 {user} and Finnnick!'

You two walk up onto the stage and a round of applaud roars around you, it eventually dies out with the sound of Caesars voice

"There she is! Our favourite girl on fire, with the charming Finnick Odair!"

(You were The Girl On Fire, and not Katniss)