"Kate really removed herself from society, from NY, from the fashion world, and she really just focused, I think, on being a mom", he told EXTRA in an interview on Wednesday, adding that despite invitations to lavish events like the Met Gala, she chose not to attend.
The determination was released Thursday, two days after the 55-year-old Spade was found dead in her Park Avenue apartment.
As Radar reported, Kate left behind a note for her husband, Andy, 55, and their 13-year-old girl, Frances, who was at school when her mom took her own life.
He said they had been living apart, but he was in touch - either visiting with her or speaking with her - every day. We loved creating our businesses together.
"We are all devastated by today's tragedy", the Spade family said in a statement provided to The New York Times. "So, I really hope that the family can come together for her daughter because it just doesn't go away".
"For the past 10 months we had been living separately, but within a few blocks of each other", he said. Andy said he had not seen the note.
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It had been rumored that Kate had been abusing alcohol and other substances, and that her depression worsened over concerns about Frances Valentine.
"[But] she didn't want to", he said. But they were committed to co-parenting their daughter, so they often ate meals together and vacationed as a family, he said.
"We were best friends trying to work through our problems in the best way we knew how", he explains. "We loved each other very much and simply needed a break", Andy Spade added.
Coach, now known as Tapestry, bought the Kate Spade brand past year for $2.4 billion, seeking to broaden its appeal.
If someone you know exhibits warning signs of suicide, the American Foundation for Suicide Prevention advises that you do not leave the person alone, call a prevention hotline, and take the person to an emergency room or seek help from a medical or mental health professional.