No need to be ashamed as to how you are feeling, it will go in cycles. Remember this all new to you and very raw, it just happened. I'm going on a whole 3 months in my sitch, its not going to be easy or go away any time soon.
I believe they have periods of missing the spouse but remember they have been detaching before the actual time she left. Emotionally it is easier for them, its easier for them to justify in their mind the decision they made. I refuse to believe after three and half years or however many years it may be the WAW never thinks of her spouse and what she left. Feelings don't run away like that.
Try as hard as you can to worry about yourself and your needs, easier said then done but it is what has to be done. Leave her alone, let her be, she is dealing with her own emotions too. She is going thru some battles of her own too. Be the dad of the universe!
I'm far from stable in my sitch but I do know what didn't work. If I knew then what I know now, things would be different without a doubt, looking back on the sitch.
You will make it. At least that is what everyone tells me!!
___________________________________________________________ M: 32 W: 26 M 7 months, T 4 years M: 2nd M W: 1st M No kids
living separately 1/26/14 W files D 2/24/14 D final 4/28/14