Welcome LFN. There is no right or wrong place for posting. I started in newcomers and then moved here. This forum is more of a parking place once you are here for awhile. Lots of traffic on my thread but folks know I am here. You would get more responses in newcomers. The MLC area is also busy but your WAW does not appear to fit that description. Also the separated area sees a lot of traffic and that may apply to you.
Your story sounds a lot like mine. Their switch turns off and they lose the feeling and they see no way of returning. Frustrating. I wish I could offer you some solution but I have been at this a year now and things are the same for me. I can fully relate to seeing a different person, the mechanical interactions, WAW seeing my changes but they are too late. Hard to figure her out and after a year at this I learned you can drive yourself crazy trying. Many do want to stay friends – I think it helps their guilt and to tell themselves they are not hurting us and this is all okay somehow. Better to stay friendly although you must be feeling anger and frustration right now (I did). But controlled anger is a good emotion.
Best thing you can do is try to detach and Get a Life (GAL) as we call it here. Focus on you. Hard to do; ask me how I know that. Do read Divorce Remedy. Have you filed for D yet? If not, give her space and be supportive of what she wants to do. Try not to let her actions get to you – whatever she does is perfectly okay, for her. You are only a few months along in the journey so anything might still happen.
Interesting you were married such a short time. Folks here seem to average about 10 years married before the bomb. Did you date long before you married? Any other issues?
Don’t worry the kids. I was 42 when my first was born. Plenty of time for you.