Three weeks, isn't enough time for some MLCer's to change their underwear let alone communication styles.
My H and I did not speak, other than minimal grunts and angry angry words for over a year before he was able to even call me "hey" to get my attention.
To which I always replied "I have a name."
You need to find patience. With him, with yourself, with the process...
"Acceptance doesn't mean resignation. It means understanding that something is what it is and there's got to be a way through it."--Michael J. Fox
