I get the big sky thing. Even though we all know the grass isn't greener on the other side...some of us are 'stuck' in the small back yard because of our M. I'm one of them. I'm a big sky gal, myself married to a little back yard.
I getcha break...but I also get your analogy about be in the moment.
And the fact that your S has the option to see any big sky he wishes in his future is a feeling I wish sometimes I could have back.
