Kate Walsh didn’t plan on her marriage to Alex Young ending after only 15 months.

“I don’t think anyone gets married thinking that they will get divorced. We certainly did not,” the Private Practice star says in the March issue of Redbook. “Alex and I still care for each other, and I wish him nothing but the best.”

Kate fears her insecurity may have fueled the split. “I second-guess myself all the time. I make a decision and then wonder if I made the wrong choice. Sometimes I come off as confident, but really I am a quivering little wharf rat underneath who is radically insecure and deeply in need of love and understand.”