"I'm very happy," Turner told the magazine before discussing the downsides of dating a fellow celebrity.
"You do feel like you're living in a fishbowl," she said of public interest in her personal life. "It's frustrating [that] it's the most mundane things that make the news -- how boring!"
"[I] keep things pretty private," she told the publication.
"I found it easier to date someone who understands the industry or is in that world," the star added. "You realize that you're not going to see each other all the time. And you don't feel like a jerk when you're like, 'My publicist says I can't do this ... '"
Turner is known for playing Sansa Stark on the HBO series Game of Thrones, which will return for a seventh season July 16. Jonas came to fame with the boy band Jonas Brothers, and presently sings with DNCE.