"I'm very happy romantically," she tells PEOPLE. "It couldn't be better!"
The Modern Family actress has been dating former True Blood hunk Joe Manganiello since early July, and the sizzling stars have taken their PDA from Malibu to Miami all summer.
Though Vergara, 42, has yet to comment publicly on her relationship with PEOPLE's Hottest Bachelor, she says she "couldn't be happier" with her career and personal life.
"I have a television show that has been successful for the past five years. And it's allowed me to do all the things I've wanted to do with my career," says Vergara, whose other main man, her son Manolo, graduates from film school next year. "It's been a lot of fun these past five years."
Manganiello, 37, has also earned the approval of her costars Julie Bowen and Sarah Hyland.
"I think they're super hot together," Hyland told PEOPLE last month, adding "They'll have really hot babies."
Reporting by MATTHEW COLE WEISS