Chad Lowe says he was upset his ex, Hilary Swank, talked publicly his substance-abuse problems
, but he'll always love her.
"It has been a tough year and not something I expected. It's very humbling," Lowe tells TV's Extra
in an interview airing Monday.
"I was disappointed that the details of our relationship became public," he says of Swank's interview in Vanity Fair
over the summer, in which she talked about the toll his substance abuse problems took on their marriage.
But he admits that her comments "were absolutely true, absolutely true. I've been sober for three and a half years and very grateful for that."
Lowe, 38, and Swank, 32, announced their split in January after eight years of marriage and, after attempts at reconciliation, told PEOPLE in May there were divorcing
More than anything, Lowe says, he was worried the Vanity Fair
revelations would make Swank look like an uncaring wife. "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," he says. "What hurt me more than anything is that people would think that she wasn't there for me and she was."
He adds: "She was the love of my life, and that's not something you just shut off. I will always love her."
The actor also says he is "very open" to the idea of finding love again. "I take great solace in the fact that I know I am capable of really deep love," he says.
Lowe is currently promoting Beautiful Ohio,
his first feature film as a director. He also joins the cast of 24
for the upcoming season.