The couple were married for nearly nine years before announcing they were divorcing in May.
Lowe tells entertainment news show Extra he was caught off-guard by her comments, saying, "It has been a tough year and not something I expected. It's very humbling.
"I was disappointed that the details of our relationship became public. They were absolutely true, absolutely true. I've been sober for three and a half years and very grateful for that."
He says, "She was the love of my life and that's not something you just shut off. I will always love her."
"I am so grateful to Hilary for her support of me in a very difficult time in my life three and a half years ago. What hurt me more than anything is that people would think that she wasn't there for me and she was."
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