Hey, played the game while I was gone. Since I couldn't see the results (thanks for screwing up and getting our internet a week later than suspected, Bell), I picked almost all of them.
He dated Callisto, but they broke up. He dated Juliet next, since she was winning the poll. But after visiting him and his family, she kept denying his romantic interactions. I headcanoned that she got sick of him or hated his trashy family, so they broke up.
He dated Brynn. But being a famous DJ is hard when you're a werewolf, and he kept rampaging in nightclubs. I figured that fame wasn't good for him. Brynn also had her issues; she kept losing control and draining people. But Caleb Vatore visited the lot after she lost at the Starligh Accolades. He cheered for her anyway. So I like to believe that he was happy to see a vamp celebrity, even a violent one. So she stayed a celebrity, while Nico gave up the life.
Gabriella was off the table because she hooked up with another guy, who turned out to be Nico's cousin, of all people. So I made Nico go with Ariella next, because she'd constantly call him while he was dating Brynn. They now live on a farm and are saving up for a flower shop.