The American Pie actress - who separated from Sestito in November - told Boston Common that she is only now beginning to understand how to live a happier life.
"It's taken years to get to know myself. I had never really taken time to cultivate who I was," she told the magazine. "I've felt drained by it."
Suvari added of her current state of mind: "I feel like I'm really, finally, content at this point in my life. I'm accepting of who I am and how diverse I am and honouring that. All of it."
The actress was previously married to cinematographer Robert Brinkmann for five years between 2000 and 2005.
Suvari reprises her American Pie role of Heather in American Reunion, opening on April 6 in the US and on May 2 in the UK.
Watch a trailer for American Reunion below: