The 40-year-old "Blended" actress says she was not able to realise initially if Kopelman was the one for her, reported People magazine.
"It was never really love at first sight. Will struck a lot of my pragmatic sides. He was someone who was always reachable on the phone, someone who was a classy human being, someone who has this incredible blueprint of a family that I don't have," Barrymore said.
The couple, that got married in 2012, have been open about their differences saying it is hard for them to adjust as their are polar opposites.