Dear Lilly,
It has been twenty years since we took our vows to love and cherish each other for life. Since then we have not spent more than a day apart. Because of the hard times we are experiencing, I had to accept the job in New Delhi. We shall thus be forced to spend weeks and months apart. Although we have already said our goodbyes to each other, I could not leave you without what I believe is a proper farewell.
I would like to express my sincere gratitude for your standing by me all these years, especially when the circumstances were tough. I hope you will continue supporting me even as we live several kilometers apart. I will send you the details of my new address and cell phone number as soon as I can.
Yours sorrowfully,
Patel