The Modern Family star, who split from Nick Loeb earlier this year, told PEOPLE her life "couldn't be better".
"I'm very happy romantically," she said.
Vergara, 42, has been dating former True Blood actor Manganiello since early July.
In an interview with EXTRA, the stunning brunette said: "You know, I'm just having a great time and it's a special time in my life and I'm trying not to think too much about it".
"It's something very new, so we will see what happens."