That letter would be viewed by your wife as pressure and your way of causing her guilt. It would not be received well.
I understand your need to acknowledge your anniversary. The first one apart is especially rough. To 'celebrate' my 28th anniversary, and the first one with out H, I gathered my kids together in a group hug and I thanked God for that day that led to the blessings of our children into my life. I was truly thankful for that day and my H, without whom, I wouldn't have my very precious gifts. Together we reaffirmed that we were a family even though one of us was missing, because of that day.
