Thank you all for your inputs. I really appreciate your support.

Yes, at the beginning when he dropped the bomb, he claims that he needs space and privacy, but still we had some conversations and shared our thoughts as normal couple. But gradually we separated to different rooms and he cut off our conversations except things for the kids. During the past couple months, periodically he was gone for couple days without telling us where he was. I feel he is more and more distant. When I tried to detach from him, he is detaching from me more.

Now he moved out, he seems more firm about the divorce. Maybe less responsibilities for kids and family makes him feel more freedom?

M 18 yrs
5 & 7 yrs old kids
H DB in 4/2013
H moved out in 11/2013